When the government need money, it …

Central Bank / RBI is an apex body that controls directs and regulates the entire cross section of the society The function that RBI performs are :- 1. Currency Authority :- The Finance minister print and regulates the one rupees note and coins and rest rupees bears by the signature of the RBI . 2. Bankers to the Bank :- A. Banker to the government :- ? It maintain current account . ?It receipts and make payment for the government and carry out exchanged remmitances for the government temporary period . ? It gives loan for the government temporary periods . The government sells it's Treasury bills and securities . B. As an agent :- It helps in maintaining public debts. C. As an financial advisors :- It advances government for political , social , economical time . 3. Bankers bank and supervisor :- ? Custodian of cash reserve ?Legal lender of last resort 4. Controller of money supplier and credit :- ? Bank rate ?Repo rate ?Reverse Repo rate ?open Market operation Legal reserve Ratio ? Cash reserve ratio ?statutory liquidity ratio ? Margin Requirement

Government's bank

Btw it's not come in any function of RBI. If you have doubt on it then you can google it also.

Central Bank is a banker to the government. As a banker to the government it manages accounts of the government. As a agent to the government, it buys and sells securities on behalf of the government. As an advisor to the government, it frames policies to regulate the money market.

This statement represents the function of BANKER OF GOVERNMENT