First census in the subcontinent occurred during the reign of which viceroy?

First census in the subcontinent occurred during the reign of which viceroy?

برصغیر میں پہلی مردم شماری کس وائسرائے کے دور میں ہوئی؟
Explanation

Census has been undertaken every 10 years beginning in 1872 under British viceroy Lord Mayo

the first complete census was taken in the sub-continent in 1881


while

The first census in Indo Pak subcontinent was held in

After independence, the first census of Pakistan was conducted in 1951

the second in 1961 

the third census was held in 1972 instead of 1971

ND23-2-2023