Explanation:

- Commercial banks play a crucial role in the financial industry.

- Option 1: Issue currency notes – This is not a function of commercial banks but rather a role of central banks.

- Option 2: Accepts deposits from customers – Commercial banks accept various types of deposits from customers such as savings and fixed deposits.

- Option 3: Provide loans to customers – Commercial banks provide various types of loans to individuals and businesses.

- Option 4: Only (b) and (c) – This option summarizes the correct functions of commercial banks.