GENERAL KNOWLEDGE

Detailed explanation-1: -Indian coinage went decimal on April 1, 1957, ten years after it gained Independence from the British. Though coins as units of monetary value have been in use for 500 years or so, India’s history of modern coinage is only about 200 years old.

Detailed explanation-2: -Aryabhata and other mathematicians of ancient India first adopted the decimal system of numbers and place value system writing numbers the way we do today.

Detailed explanation-3: -On 31 August 1971, the 1d and 3d were officially withdrawn from circulation, ending the transition period to decimal currency.