Explanation:

- Option 1: A is not guilty of offence of attempt to cause miscarriage

• This is not correct. The law punishes the attempt to cause miscarriage even if the woman is not pregnant, as the intent and action to cause miscarriage exist.

- Option 2: A is guilty of murder

• This is not correct. There is no death caused here and no intention or knowledge of causing death.

- Option 3: A is guilty of offence of attempt to cause miscarriage

• This is correct. Under IPC Section 511 read with Section 312, even if the woman is not pregnant, the attempt is punishable.

- Option 4: None of the above

• Incorrect, as Option 3 is applicable.