Commercial banks are mandated to maintain a certain proportion of their Net Demand and Time Liabilities (NDTL) in the form of government securities. This is known as the Statutory Liquidity Ratio (SLR). By holding these securities, banks effectively lend to the government, as government securities represent government debt. The Cash Credit Ratio is not a standard monetary policy term. Debt Service Obligation refers to the repayment of loans. The Liquidity Adjustment Facility (LAF) involves short-term borrowing and lending between banks and the RBI, not directly providing credit to the government by commercial banks.