The first complete census taken in India is in the year ______.

Correct option is A

Census in India was started in 1872 and the first complete Census was taken in the year 1881. It was conducted during the British colonial period and covered the territories that were under British control at the time.
The census was conducted by Lord Mayo, who was the Viceroy and Governor-General of India.
The census of India is now conducted every ten years by the Registrar General and Census Commissioner of India, under the Ministry of Home Affairs.
The last census conducted in 2011, was the 15th Census of India. The next Census was to be held in 2021, But it has been postponed due to the COVID-19 pandemic in India.