Explanation: Though the offices of the leader of the House and the leader of the Opposition are not mentioned in the Constitution of India, they are mentioned in the Rules of the House and Parliamentary Statute respectively.

• The office of ‘whip’, on the other hand, is mentioned neither in the Constitution of India nor in the Rules of the House nor in a Parliamentary Statute.
• It is based on the conventions of the parliamentary government.

Source: Laxmikanth