The correct answer is (c) 1872.
The first complete Census of India was conducted in 1872. It was a massive undertaking, involving the enumeration of over 250 million people. The census was conducted by the British East India Company, which was then the ruling power in India.
The census was important for a number of reasons. It provided the British with a detailed understanding of the population of India, which was essential for planning and development. It also helped to promote a sense of national identity among Indians.
The census was not without its problems. There were concerns about the accuracy of the data, and some people objected to the fact that the British were collecting information about them. However, the census was a landmark event in Indian history, and it continues to be conducted every ten years.
The other options are incorrect because they are not the years in which the first complete Census of India was conducted.