which of the following serves as a banker's bank?

The Central Bank serves as a banker's bank. The Central Bank is the apex bank that regulates the banking system of a country. It acts as the banker to the government and all other banks operating within the country. One of its main functions is to ensure the stability of the financial system by regulating the money supply, controlling inflation, and acting as a lender of last resort to other banks. As a banker's bank, it provides financial services such as loans, deposits, and other financial facilities to other banks. It also supervises and regulates the activities of other banks and ensures that they operate within the legal framework and guidelines set by the regulatory authorities.