Which of the following is not the function of Reserve Bank of India (RBI)?

Issuing bank notes, acting as banker to the Government and holding the cash reserves of commercial banks are core RBI functions under the Reserve Bank of India Act 1934. Opening savings accounts for the general public is a commercial-bank service, so "To open saving bank account for general public" is not an RBI function.

Current law: RBI introduced Retail Direct gilt accounts for individual government-securities investors in 2021. These are securities-investment accounts, not ordinary savings-bank accounts, so the distinction remains.