The correct option is C None of the above
The Planning Commission was a non-constitutional and non-statutory body and was set up to formulate five years plan for social and economic development in India. Its main function is to assess the resource of the country, formulate plans to increase economic development which included laying down of five-year plan. It is now replaced with NITI (National Institution for Transforming India) Aayog in 2015 by the Government of India.