When was the first all-India census attempted in British India?

1872

The correct answer is Option (1) → 1872

The growth of cities was monitored through regular headcounts. By the mid-nineteenth century several local censuses had been carried out in different regions. The first all-India census was attempted in 1872. Thereafter, from 1881, decennial (conducted every ten years) censuses became a regular feature. This collection of data is an invaluable source for studying urbanisation in India.