Correct option is A
The Reserve Bank of India (RBI) follows the Minimum Reserve System for issuing currency. Since 1956, the RBI maintains a minimum reserve of ₹200 crore in gold and foreign securities. This system allows the RBI to issue currency as long as it maintains this minimum reserve, providing flexibility to manage the supply of currency in the economy without needing to hold a proportionate amount of gold or foreign exchange for each unit of currency issued.