The correct answer is: d) All of the above
Census data is collected in Sikkim through a variety of methods, including household surveys, satellite imagery, and government records.
Household surveys are the most common method of collecting census data. These surveys are conducted by trained enumerators who visit households and ask questions about the people living there. The information collected in these surveys includes age, sex, education, employment, and housing.
Satellite imagery is also used to collect census data. Satellites can be used to map the population of an area and to identify changes in population density over time. This information can be used to improve the accuracy of census data and to target resources to areas with the greatest need.
Government records are another source of census data. These records include information on births, deaths, marriages, and immigration. This information can be used to track changes in the population over time and to identify trends.
By collecting data through a variety of methods, the government of Sikkim is able to obtain a comprehensive picture of the population. This information is used to make decisions about planning, development, and resource allocation.