Explanation:

- Article 72: Under this article, the President of India has the power to grant pardons, reprieves, respites, or remissions of punishment. This applies for offenses related to matters under the union's executive power.

- Article 70: This article deals with the discharge of the President's functions in other contingencies. It outlines provisions for carrying out presidential duties when specific situations not covered elsewhere might arise.

- Article 71: It relates to matters concerning the election of the President and Vice-President, and addresses disputes in their elections.

- Article 73: It defines the extent of the executive power of the union.