The correct answer is: b) Census
A census is a complete count of a population. It is conducted by the government to collect data on the population, such as age, sex, race, ethnicity, and housing. The data collected in a census is used to plan and allocate resources, such as schools, hospitals, and roads.
Sample surveys are conducted to collect data on a subset of the population. They are less expensive than censuses, but they are not as accurate. Sample surveys are often used to collect data on topics that are difficult to measure in a census, such as income and education.
Local registration is the process of recording births, deaths, and marriages. This data is used to track population changes and to provide vital statistics, such as birth and death rates.
School enrollment records are used to track the number of students enrolled in schools. This data is used to plan and allocate resources for education.
In conclusion, the Government of India conducts a census to obtain accurate population data. A census is a complete count of a population, and it is the most accurate way to collect data on the population.