| 1987-98 & 2006-09 |
Member, West Bengal Legislative Assembly (Four Terms) |
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| 1998 |
Elected to 12th Lok Sabha |
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| 1998-99 |
Member, Committee on Public Undertakings |
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Member, Business Advisory Committee |
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Member, Standing Committee on Urban and Rural Development |
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Member, Standing Committee on Communications |
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Member, Consultative Committee, Ministry of Railways |
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| 1999 |
Re-elected to 13th Lok Sabha (2nd term) |
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Chief Whip, All India Trinamool Congress Parliamentary Party, Lok Sabha |
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| 1999-2000 |
Member, Committee of Privileges |
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Member, Standing Committee on Finance |
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Member, Committee on Members of Parliament Local Area Development Scheme |
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Member, Standing Committee on Labour and Welfare |
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Member, Committee on Public Undertakings |
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Member, Joint Parliamentary Committee on Wakf Board |
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| 2000-2001 |
Member, Committee on Public Undertakings |
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| 2000-2004 |
Member, Consultative Committee, Ministry of Railways |
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| 2009 |
Re-elected to 15th Lok Sabha (3rd term) |
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| 31 Aug. 2009 |
Member, Standing Committee on Finance |
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Member, Consultative Committee, Ministry of Defence |
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| July 2011 |
Leader, All India Trinamool Congress Parliamentary Party, Lok Sabha |
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| July 2011 - 22 Sept. 2012 |
Union Minister of State, Health and Family Welfare |
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| May 2014 |
Re-elected to 16th Lok Sabha (4th term) |
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Leader, AITC Party in Lok Sabha (16th) |
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| 13 June 2014 - 25 May 2019 |
Member, Business Advisory Committee |
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| 14 Aug. 2014 - 25 May 2019 |
Member, Public Accounts Committee |
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| 1 Sep. 2014 - 25 May 2019 |
Member, Standing Committee on Finance |
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| 2 Sep. 2014 - 25 May 2019 |
Member, Joint Committee on Salaries and Allowances of Members of Parliament. |
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Member, Consultative Committee, Ministry of Civil Aviation |
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| 15 Sep. 2014 - 25 May 2019 |
Member, Committee on Members of Parliament Local Area Development Scheme (MPLADS) |
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| 08 Oct. 2014 - 25 May 2019 |
Member, Joint Parliamentary Committee on Maintenance of Heritage Character and Development of Parliament House Complex |
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| 29 Jan. 2015 - 25 May 2019 |
Member, General Purposes Committee |
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| 1 Sept. 2016 - 25 May 2019 |
Chairperson, Standing Committee on Railways |
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| 7 June 2018 - 25 May 2019 |
Member, Samsad (Court) of Visva-Bharati |
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| May 2019 |
Re-elected to 17th Lok Sabha (5th term) |
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| 20 June 2019 onwards |
Member, Business Advisory Committee |
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| 13 Sept. 2019 onwards |
Chairperson, Standing Committee on Food, Consumer Affairs and Public Distribution |
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| 09 Oct. 2019 onwards |
Member, Committee on Government Assurances |
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| 21 Nov. 2019 onwards |
Member, General Purposes Committee, Lok Sabha |
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| 23 Oct. 2019 - 21 Dec. 2020 |
Member, Consultative Committee, Ministry of Civil Aviation |
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| 2020 onwards |
Member, Samsad (Court) of Visva-Bharati |
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| 22 Dec. 2020 onwards |
Member, Consultative Committee, Ministry of Defence |
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