One of the functions of commercial banks that cannot be performed by central banks is

Commercial banks and central banks are both important players in the banking system. However, they perform different functions. One of the functions of commercial banks that cannot be performed by central banks is the collection of deposits from the public. Commercial banks accept deposits from individuals and businesses and use the money to make loans and investments. Central banks, on the other hand, are responsible for regulating the money supply, controlling inflation, and stabilizing the economy through monetary policy. While central banks can issue and redeem government securities such as treasury bills, they do not collect deposits from the public. Therefore, the correct option is: "collection of deposits from the public."