The correct answer is: a) Office of the Registrar General & Census Commissioner.
The Office of the Registrar General & Census Commissioner is the nodal agency responsible for conducting the Census in India. It is a statutory body under the Ministry of Home Affairs. The Census is conducted every 10 years and provides a comprehensive snapshot of the population of India. The data collected by the Census is used for a variety of purposes, including planning, development, and policymaking.
The National Statistical Commission is an independent body that is responsible for providing advice to the Government of India on statistical matters. It was established in 1959 and is headed by the Prime Minister. The Planning Commission was a body that was responsible for planning the economic development of India. It was established in 1950 and was abolished in 2014. The Ministry of Home Affairs is a ministry of the Government of India that is responsible for internal security, law and order, and border management.