The correct answer is C. Registrar General and Census Commissioner.
The Registrar General and Census Commissioner is the head of the Office of the Registrar General and Census Commissioner, India, which is responsible for conducting the decennial census of India. The office is also responsible for maintaining the population register of India.
The National Sample Survey Organisation (NSSO) is a government agency under the Ministry of Statistics and Programme Implementation, India. The NSSO is responsible for conducting large-scale sample surveys in India. The surveys cover a wide range of topics, including population, employment, agriculture, and household consumption.
The Central Statistical Organisation (CSO) is a government agency under the Ministry of Statistics and Programme Implementation, India. The CSO is responsible for collecting, compiling, and disseminating official statistics on the Indian economy. The CSO publishes a variety of statistical reports, including the National Accounts Statistics, the Consumer Price Index, and the Index of Industrial Production.
None of the above is the correct answer.