Give some stream of consciousness and then the answer. The RBI plays an important part in the Development Strategy of the Government of India. It is a member bank of the Asian Clearing Union. The general superintendence and direction of the RBI is entrusted with the 21-member central board of directors: the governor; four deputy governors; two finance ministry representatives (usually the Economic Affairs Secretary and the Financial Services Secretary); ten government-nominated directors to represent important elements of India's economy; and four directors to represent local boards headquartered at Mumbai, Kolkata, Chennai and the capital New Delhi. Each of these local boards consists of five members who represent regional interests, the interests of co-operative and indigenous banks.

Answer this question: how many deputy governors are there in rbi?
The important part for answering this question is: The general superintendence and direction of the RBI is entrusted with the 21-member central board of directors: the governor; four deputy governors; two finance ministry representatives (usually the Economic Affairs Secretary and the Financial Services Secretary); ten government-nominated directors to represent important elements of India's economy; and four directors to represent local boards headquartered at Mumbai, Kolkata, Chennai and the capital New Delhi.
Therefore, the answer is four.