The Reserve Bank of India (RBI) serves as India's central bank and holds the exclusive authority for currency issuance and management. As per the RBI Act of 1934, the RBI is empowered to issue all denominations of banknotes, with the exception of one-rupee notes and coins, which are issued by the Government of India. Despite this exception, the RBI is responsible for circulating these one-rupee notes and coins. Through its printing facilities and rigorous control mechanisms, the RBI guarantees a sufficient, authentic, and secure currency supply. It also removes unfit notes, replacing them with new ones to uphold the currency system's integrity. The State Bank of India (SBI) is a commercial bank and lacks currency issuance authority. The Finance Ministry is responsible for economic policy formulation but does not directly issue or circulate currency. Consequently, option (B) RBI is the accurate choice, identifying it as the singular authority for currency issuance and management in India.