The correct answer is: a) Office of the Registrar General and Census Commissioner.
The Office of the Registrar General and Census Commissioner is a statutory body under the Ministry of Home Affairs, Government of India. It is responsible for conducting the census in India. The census is a decennial exercise that provides a comprehensive picture of the population of India. It is used to plan for development and to monitor progress.
The NITI Aayog is a policy think tank of the Government of India. It was set up in 2015 to replace the Planning Commission. The NITI Aayog is not responsible for conducting the census.
The Ministry of Statistics is a ministry of the Government of India. It is responsible for collecting and compiling statistics. The Ministry of Statistics is not responsible for conducting the census.
The State Planning Boards are statutory bodies under the respective state governments. They are responsible for planning and development in the states. The State Planning Boards are not responsible for conducting the census.