Explanation:

- Pranab Mukherjee served as the President of India from 2012 to 2017. During his tenure, the 100th Amendment of the Constitution of India was given assent.

- Ram Nath Kovind was the President of India starting in 2017, and therefore, he was not in office when the 100th Amendment was passed.

- APJ Abdul Kalam served as the President from 2002 to 2007. His term ended long before the 100th Amendment.

- Pratibha Devisingh Patil was President from 2007 to 2012, before the 100th Amendment.

- The 100th Amendment involved a land boundary agreement between India and Bangladesh, enacted in 2015.

Correct Answer: Pranab Mukherjee