1970-80
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General-Secretary, Mahila Congress (I), West Bengal
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1978-81
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Secretary, District Congress Committee (Indira) [D.C.C. (I)], Calcutta South
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1984
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Elected to 8th Lok Sabha
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General-Secretary, All India Youth Congress (I)
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1985-87
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Member, Committee on the Welfare of Scheduled Castes and Scheduled Tribes
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1987-88
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Member, National Council, All India Youth Congress (I)
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Member, Consultative Committee, Ministry of Home Affairs
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Member, Consultative Committee, Ministry of Human Resource Development
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1988
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Member, Executive Committee, Congress Parliamentary Party [C.P.P. (I)]
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1989
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Member, Executive Committee, Pradesh Congress Committee [P.C.C. (I)],
West Bengal
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1990
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President, Youth Congress, West Bengal
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1991
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Re-elected to 10th Lok Sabha (2nd term)
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1991-93
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Union Minister of State, Human Resource Development, Department of Youth Affairs and Sports; and Women and Child Development
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1993-96
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Member, Committee on Home Affairs
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1995-96
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Member, Consultative Committee, Ministry of Home Affairs
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Member, Committee on Public Accounts
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1996
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Re-elected to 11th Lok Sabha (3rd term)
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1996-97
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Member, Committee on Home Affairs
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Member, Consultative Committee, Ministry of Home Affairs
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1997
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Founded All India Trinamool Congress and elected Chairperson, All India Trinamool Congress
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1998
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Re-elected to 12th Lok Sabha (4th term)
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1998-99
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Chairman, Committee on Railways
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Member, General Purposes Committee
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Member, Consultative Committee, Ministry of Home Affairs
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1999
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Re-elected to 13th Lok Sabha (5th term)
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Leader, All India Trinamool Congress Parliamentary Party, Lok Sabha
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Member, General Purposes Committee
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13 Oct. 1999 – 16 Mar. 2001
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Union Cabinet Minister, Railways
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2001-2003
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Member, Consultative Committee, Ministry of Industries
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8 Sep. 2003 – 8 Jan. 2004
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Union Cabinet Minister (without any portfolio)
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9 Jan. 2004- May 2004
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Union Cabinet Minister, Coal and Mines
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2004
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Re-elected to 14th Lok Sabha( 6th term)
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Member, Committee on Personnel, Public Grievances, Law & Justice
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5 Aug. 2006
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Member, Committee on Home Affairs
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5 Aug. 2007
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Member, Committee on Home Affairs
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2009
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Re-elected to 15th Lok Sabha (7th term)
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31 May 2009-19 July 2011
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Union Cabinet Minister, Railways
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Leader, All India Trinamool Congress Parliamentary Party, Lok Sabha
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9 Oct. 2011
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Resigned from 15th Lok Sabha
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