1980
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Elected to 7th Lok Sabha
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1981
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Member, Secretariat, Communist Party of India (Marxist) [C.P.I.(M)], Distt. Committee, Purulia
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Member, State Committee, C.P.I.(M), West Bengal
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1984
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Re-elected to 8th Lok Sabha (2nd term)
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1985 onwards
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Member, State Committee, C.P.I.(M), West Bengal
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1985-89
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Member, Railway Convention Committee
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1986-89
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Member, Joint Select Committee on Railways Bill
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1989
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Re-elected to 9th Lok Sabha (3rd term)
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1990-91
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Chairman, Committee on Public Undertakings
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Member, General Purposes Committee
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1990-96
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Member, Consultative Committee, Ministry of Railways
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1991
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Re-elected to 10th Lok Sabha (4th term)
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1993-95
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Member, Committee on Public Undertakings
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1993-96
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Chairman, Committee on Government Assurances
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Member, Committee on Railways
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1996
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Re-elected to 11th Lok Sabha (5th term)
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1996-97
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Chairman, Committee on Railways
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Member, Panel of Chairman
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Member, Consultative Committee, Ministry of Industry
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1998
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Re-elected to 12th Lok Sabha (6th term)
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Member, Panel of Chairman, Lok Sabha
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1998-99
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Convenor, Sub-Committee on Power, Committee on Energy
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Member, Committee on Energy and its Sub-Committees on Coal and
Action Taken Reports
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Member, Committee of Privileges
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Member, General Purposes Committee
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Member, Committee to review the rate of dividend payable by the Railway
Undertakings to General Revenues
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Member, Consultative Committee, Ministry of Industry
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Special Invitee, Consultative Committee, Ministry of Railways
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1999
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Re-elected to 13th Lok Sabha (7th term)
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1999-2004
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Chairman, Committee on Petitions
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Member, Committee on Energy
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Member, General Purposes Committee
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2000-2004
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Member, Consultative Committee Ministry of Railways
Special Member, Consultative Committee, Ministry of Industry
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2004
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Re-elected to 14th Lok Sabha( 8th term)
Leader, CPI (M) Parliamentary Party, Lok Sabha
Chairman, Committee on Railways
Member, Rules Committee
Member, General Purposes Committee
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Member, Committee on Security in Parliament Complex
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Member, Committee on Installation of Portraits/Statues of National Leaders and Parliamentarian in Parliament House
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Member, Consultative Committee, Ministry of Heavy Industry & Public Enterprises
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Special Member, Consultative Committee, Ministry of Power
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5 Aug. 2007
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Chairman, Committee on Railways
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2008
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Member, Central Committee CPI (M)
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2009
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Re-elected to 15th Lok Sabha (9th term)
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Leader, CPI (M) Parliamentary Party, Lok Sabha
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Jun. 2009
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Member, Panel of Chairmen, Lok Sabha
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29 Jun. 2009
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Member, Business Advisory Committee
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31 Aug. 2009
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Chairman, Committee on Agriculture
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19 Oct. 2009
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Member, General Purposes Committee
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Member, Consultative Committee, Ministry of Heavy Industries & Public Enterprises
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Special Member, Consultative Committee, Ministry of Power
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