The Census of India uses two phases for data collection:

The correct answer is: a) House listing & Housing Census

The Census of India is a decennial survey of the Indian population. It is conducted by the Office of the Registrar General and Census Commissioner, India, under the Ministry of Home Affairs. The first Census of India was conducted in 1872.

The Census of India uses two phases for data collection:

1. House listing and housing census: This phase involves the enumeration of all households in the country. The data collected during this phase includes the number of households, the number of persons in each household, the sex of each person, the age of each person, and the educational status of each person.
2. Population enumeration: This phase involves the enumeration of all persons in the country. The data collected during this phase includes the name of each person, the sex of each person, the age of each person, the educational status of each person, the occupation of each person, and the religion of each person.

The data collected during the Census of India is used for a variety of purposes, including planning and development, allocation of resources, and monitoring of progress.

The other options are incorrect because they are not phases of the Census of India.

• Option b, Population Enumeration, is a part of the Census of India, but it is not a separate phase.
• Option c, Economic Census, is a separate census that is conducted by the Office of the Registrar General and Census Commissioner, India.
• Option d, Sample Survey, is a method of data collection that is used by the Census of India, but it is not a separate phase.