Answer : 1. "के.राधाकृष्णन "
Explanation :

The Mars Orbiter Mission (Mangalyaan) was launched by the Indian Space Research Organisation (ISRO) on November 5, 2013. At that time, Dr. K. Radhakrishnan was the Chairman of ISRO. Mangalyaan was India's first interplanetary mission, and it made India the first Asian nation to reach Martian orbit and the first nation in the world to do so in its maiden attempt.