Solution:

• Article 53 : Executive power of the Union? shall be vested in the President and shall be exercised by him either directly or through officers subordinate to him in accordance with this Constitution.
• Article 52 : The President of India. There shall be a President of India.
• Article 72: The President shall have the power to grant pardons.
• Article 54 in The Constitution Of India 1949 deals with election of President The President shall be elected by the members of an electoral college consisting of the elected members of both Houses of Parliament