The correct answer is K Sivan.Scientist K Sivan:Eminent scientist Dr. K Sivan was appointed on 10 January 2018 as the new Chairman of the Indian Space Research Organisation (ISRO).He was appointed by the government as the chairman of the 'Indian Space Research Organization' (ISRO).He has succeeded AS Kiran Kumar.He is known as The Rocket Man and has been involved in launching many satellites in the history of ISRO.Additional InformationVikram Sarabhai:Dr. Vikram Sarabhai was born on August 12, 1919, in Ahmadabad.Dr. Vikram Sarabhai was considered the Father of the Indian space program.He was a great institution builder and established a large number of institutes in diverse fields.He was instrumental in establishing the Physical Research Laboratory (PRL) in Ahmedabad in November 1947.He was also Chairman of the Atomic Energy Commission.Dr. Sarabhai's dialogue with NASA in 1966, the Satelite Instructional Television Experiment (SITE) was launched during July 1975-July 1976.Dr. Sarabhai started a project for the fabrication and launch of an Indian Satellite.As a result, the first Indian satellite, Aryabhata, was put in orbit in 1975 from a Russian Cosmodrome.He founded a Community Science Centre at Ahmedabad in 1966.Today, the Centre is called the Vikram A Sarabhai Community Science Centre.?APJ Abdul Kalam:APJ Abdul Kalam was known as the Missile Man of India for his important role in the nation's civilian space programme and military missile development. Also, in 1998, he made significant contributions to India's Pokhran-II nuclear tests.?Rakesh Sharma:Rakesh Sharma is an Indian military pilot and cosmonaut.He was the first Indian citizen to go into space.In 1984, he became the first Indian citizen to enter space.He went to space as a part of a joint program between the ISRO and the Soviet Intercosmos space program.He was a part of Soviet rocket Soyuz T-11 launched from Baikonur Cosmodrome in Kazakh Soviet Socialist Republic.