Correct option is D
The functions of the Reserve Bank of India (RBI) include:
A. Issue of Currency: The RBI has the authority to issue and manage the currency in India.
C. Banker of Government: The RBI acts as the banker and financial advisor to the central and state governments, managing their accounts and handling their financial transactions.
D. Bankers Bank: The RBI performs the role of a banker's bank by providing banking services to other banks, such as maintaining their reserves, extending credit facilities, and acting as a lender of last resort.
E. Credit Control: The RBI has the responsibility to regulate and control the credit flow in the economy to maintain price stability and promote economic growth.
Therefore, the correct answer is (d) A, C, D, and E only.