In which year was the first All India Census attempted and from which

In which year was the first All India Census attempted and from which year did the Decennial Census become a regular feature ?

1861 and 1881 respectively
1776 and 1801 respectively
1872 and 1881 respectively
1881 and 1891 respectively
This question was previously asked in
UPSC CISF-AC-EXE – 2023
The first attempt at an All India Census was made in 1872, and the Decennial Census became a regular feature starting from 1881.
The census in India is conducted by the Registrar General and Census Commissioner of India under the Ministry of Home Affairs.
The 1872 census was conducted under Lord Mayo and was not synchronous across the whole country. The first synchronous decennial census was conducted in 1881 under Lord Ripon, and it has been held regularly every ten years thereafter.