Explanation:

- Section 499 IPC: Defamation is defined under Section 499 of the Indian Penal Code (IPC). It refers to any spoken or written words or visible representations that harm a person's reputation.

- Section 500 IPC: This section deals with the punishment for defamation, which may include a fine or imprisonment.

- Section 501 IPC: This section refers to the offense of printing or engraving defamatory content.

- Option 4, None of these: This option is incorrect as defamation is explicitly covered under sections of the IPC mentioned above.

Correct Answer: Option 2 - Section 499 IPC