The correct answer is C. Central Statistical Organisation (CSO).
The CSO is a government agency under the Ministry of Statistics and Programme Implementation, Government of India. It is responsible for collecting, compiling, analyzing, and publishing statistical data on the Indian economy. The CSO prepares the national income estimates of India, which are used to track the country’s economic growth.
The Planning Commission was a government body in India that was responsible for planning the country’s economic development. It was abolished in 2014 and its functions were transferred to the National Institution for Transforming India (NITI Aayog).
The Reserve Bank of India is the central bank of India. It is responsible for managing the country’s monetary policy and regulating the financial system. The RBI does not prepare national income estimates.
The Indian Statistical Institute is a research institute that is headquartered in Kolkata, India. It is one of the leading statistical institutes in the world. The ISI does not prepare national income estimates.