Which players made up the famous Indian spin quartet?

Which players made up the famous Indian spin quartet?

The Indian spin quartet is the collective name given to the famous Indian spin bowlers of the 1960’s and 70’s. Erapalli Prasanna and Srinivas Venkataraghavan (both off spinners), Bhagwat Subramanya Chandrasekhar (a leg spinner) and Bishen Singh Bedi (a left arm spinner). Between them, they played more than 225 Test matches, taking around 800 wickets. They were one of the most deadly combinations in world cricket. However, this four hardly played together in the same match.