The correct answer is: d) All of the above.
The Census of India is a decennial census of India, conducted by the Office of the Registrar General and Census Commissioner, India. The census is used to collect data on the population, households, and housing units in India. The data collected by the census is used for planning and development purposes by the government of India and state governments.
The census is conducted in two phases: the houselisting and housing census phase and the population enumeration phase. The houselisting and housing census phase is conducted in the first few months of the census year. During this phase, enumerators visit all households in the country and collect data on the household structure, housing characteristics, and amenities.
The population enumeration phase is conducted in the last few months of the census year. During this phase, enumerators visit all households in the country and collect data on the population, including age, sex, education, religion, and occupation.
A post-enumeration survey is conducted after the census to assess the quality of the census data. The post-enumeration survey is conducted by a sample of households and collects data on the same topics as the census. The data collected by the post-enumeration survey is used to adjust the census data for errors and omissions.