Explanation:

- Option 1: No offence.

- Administering a harmless substance, even with intent, does not amount to a criminal attempt unless the act is capable of causing miscarriage.

- Under Indian Penal Code Section 511 (for attempts) and 312, there must be some act leading to the possible miscarriage.

- If the substance is harmless, there is no real risk, so the law does not consider it an attempt.

- Option 2: Attempt to cause murder of unborn child.

- This does not apply; murder of an unborn child is a different offence, and there is no actual capability of causing death or harm in this scenario.

- Option 3: Attempt to cause abortion.

- For attempt, some act must be done towards completion of abortion.

- Since the substance is harmless, it is not considered an attempt legally.

- Option 4: Culpable homicide.

- Culpable homicide is causing death of a living person, which does not relate to merely attempting miscarriage, especially with a harmless substance.

Correct Answer: Option 1 - No offence.