The correct option is
D It is a proportion of cash, the commercial banks have to deposit with the RBI
Cash Reserves Ratio (CRR) refers to the
proportion of total deposits of the commercial banks which they must keep as reserves with the central bank in the form of cash. In other words it is the proportion of cash which the commercial have to deposit to the Reserve Bank of India(RBI) which is the central bank in India. Cash reserve ratio is
determined by RBI so that they can control the amount of credit
creation of the commercial banks at the time of inflation or deflation in the
economy.