The correct answer is (d). Income source is not collected during the Punjab Census.
The Punjab Census is a survey of the population of Punjab, India. It is conducted every ten years by the Government of Punjab. The census collects data on a variety of topics, including age, sex, marital status, religion, education, occupation, and housing. The data collected by the census is used to plan and develop policies and programs for the state of Punjab.
Income source is not collected during the census because it is considered to be a sensitive topic. The government does not want to collect data that could be used to discriminate against individuals or groups. Additionally, collecting data on income source would be very expensive and time-consuming.
The other options (a), (b), and (c) are all collected during the census. Age is collected to determine the age structure of the population. Marital status is collected to determine the proportion of the population that is married, unmarried, widowed, or divorced. Religion is collected to determine the religious composition of the population.