The correct answer is: B. Rajiv Kumar.
Rajiv Kumar is an Indian economist and the current Vice-Chairman of NITI Aayog, a government think tank in India. He was appointed to the position in January 2015. Prior to that, he was the Secretary of the Department of Economic Affairs in the Ministry of Finance. He has also served as the Chief Economic Advisor to the Government of India.
Sindhu Sri Khullar is a retired Indian Administrative Service officer who served as the Secretary of the Department of Personnel and Training. She was the first woman to hold this position. She has also served as the Secretary of the Department of Expenditure and the Department of Economic Affairs.
Bibek Debroy is an Indian economist and a member of the Rajya Sabha, the upper house of the Indian Parliament. He is also the chairman of the Economic Advisory Council to the Prime Minister of India.
V. S. Saraswat is an Indian scientist and a former chairman of the Atomic Energy Commission of India. He is also a former director of the Bhabha Atomic Research Centre.
NITI Aayog was constituted in 2015 by the Government of India to replace the Planning Commission. It is a policy think tank that advises the government on economic and social issues.