Explanation:

- Option 1: Always an offence.

- This means abetment is considered a crime in every case, no matter the circumstances.

- Option 2: Never an offence

- This says abetment is not a crime at all, which is incorrect.

- Option 3: May be an offence depending on the circumstances but not always

- Abetment is an offence under law only if it meets certain conditions, like intention and an act of abetment. Sometimes, abetment isn’t punishable if the main offence isn't committed or attempted, unless specified by law.

- Option 4: None

- Suggests none of the above options are correct, which isn't true.

Correct Answer: Option 3 is right.