The correct answer is: a) Ministry of Home Affairs.
The Ministry of Home Affairs (MHA) is the ministry of the Government of India that is responsible for the maintenance of internal security, law and order, and border management. The MHA also has jurisdiction over the Census of India, which is a decennial survey of the population of India. The Census of India is conducted by the Office of the Registrar General and Census Commissioner, India, which is a subordinate office of the MHA.
The Planning Commission was a body of the Government of India that was responsible for formulating and implementing India’s Five-Year Plans. The Planning Commission was abolished in 2014 and its functions were transferred to the National Institution for Transforming India (NITI Aayog).
The Election Commission is an independent constitutional body of India that is responsible for conducting elections to the Parliament of India, the legislative assemblies of the states, and the offices of the President and Vice President of India.
The Ministry of Statistics is a ministry of the Government of India that is responsible for collecting, compiling, analyzing, and publishing statistical data. The Ministry of Statistics also has jurisdiction over the National Sample Survey Organisation (NSSO), which is a government agency that conducts household surveys in India.