The correct answer is Leader of the opposition of the upper house.

• Leader of the opposition of the upper house is not Member of the Selection Committee for Lokpal.

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• The Selection Committee for the Lokpal
  • The Selection Committee for the Lokpal shall comprise of:
    • The Prime Minister (Chief Minister in state case)
    • Speaker of the Lower House
    • Leaders of the Opposition of the Lower House 
    • The Chief Justice of India (Chief Justice of the High Court) or a judge of the Supreme Court nominated by hiM
    • An eminent jurist nominated by the President (Governor)
    • The Bill makes it mandatory for the Selection Committee to constitute a search committee of at least seven members. 
    • At least 50% of the members shall be from among SC, ST, OBC, women or minority communities.
    • The Selection Committee may consider a candidate other than one recommended by the Search Committee.   

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• The Lokpal Act of 2013:
  • The Act allows setting up of anti-corruption ombudsman called Lokpal at the Centre and Lokayukta at the State-level.
• Composition: 
  • The Lokpal consists of a Chairperson and eight members.
  • Four of the judicial members have been former Chief Justices of different High Courts 
  • The four non-judicial members have been from All India Services/Central Services.
• First Chairperson of the Lokpal:
  • Shri Justice Pinaki Chandra Ghose, who is a former Judge of Supreme Court of India and was a sitting member of the National Human Rights Commission.