Explanation:

The number of exceptions to the offence of defamation is an important aspect of understanding this area of law. Here's a brief overview:

- Option 1: Five

- This option is incorrect, as more than five exceptions exist.

- Option 2: Six

- This option is also incorrect, as there are more than six exceptions.

- Option 3: Nine

- This option is incorrect; the number is more than nine.

- Option 4: Ten

- Defamation has ten exceptions outlined in legal frameworks, such as the Indian Penal Code. These exceptions offer defenses or justifications like truth, fair comment, public good, and others.