The correct option is C RBI
Central bank is an apex bank that regulates and controls the entire banking system of a country. The central bank lends money to government and the commercial banks when they are facing liquidity crunch or any type of insolvency. The central bank are the last resort to provide loans to the government and commercial banks against any type of collateral. Since Reserve Bank of India(RBI) is the central bank of India, it is also known as the lender of the last resort in India.