Correct Answer: All of the above

Solution : d). All of the above

The Reserve Bank of India (RBI) performs all of the functions listed. As the central bank of India, the RBI has several important functions, including:

Formulating monetary policy: The RBI is responsible for formulating and implementing monetary policy in India, which involves regulating the money supply, interest rates, and credit availability to maintain price stability and promote economic growth.

Issuing currency notes: The RBI has the authority to issue and regulate the supply of currency notes in India. It manages the circulation of currency, ensures an adequate supply of currency to meet the public's demand, and maintains the integrity of the currency.

Regulating and supervising the functioning of banks: The RBI acts as the regulator and supervisor of banks and financial institutions in India. It formulates regulations and guidelines to ensure the safety, soundness, and stability of the banking system. The RBI also conducts inspections, sets capital adequacy norms, and oversees compliance with various banking regulations.

Therefore, the correct answer is All of the above.