Explanation:

- Option 1: 1 month

- This is not the lowest period of imprisonment under the Code.

- Option 2: 14 days

- This is not the lowest, although some offences can have 14 days, it is not the minimum prescribed.

- Option 3: 15 days

- ?? Correct Answer: The Indian Penal Code (IPC) prescribes 15 days as the minimum period of simple or rigorous imprisonment (for example, under Section 510 IPC).

- Option 4: 24 hours

- Imprisonment for only 24 hours is not specified as the lowest term in the IPC.

Correct Option: Option 3 - 15 days