The correct answer is: d) All of the above
A census is a count of a population. It is a regularly occurring and official count of a particular population. Censuses are used to determine population size, growth rate, and other characteristics of the population.
Sex ratio is the ratio of males to females in a population. It is calculated by dividing the number of males by the number of females and multiplying by 100.
Literacy rate is the percentage of the population that can read and write. It is calculated by dividing the number of literate people by the total population and multiplying by 100.
Population density is the number of people per unit area. It is calculated by dividing the total population by the total area.
All of these demographic indicators can be calculated using census data.