Explanation:

- Option 1: When the execution of murder falls short

- Attempted murder is punishable. Actual execution can result in murder charges if completed.

- Option 2: Causing miscarriage

- Both the attempt and actual act of causing miscarriage are punishable under law.

- Option 3: Suicide

- Suicide itself is not punishable. However, attempting suicide was an offense in some places, though many regions now focus on providing help rather than punishment.

- Option 4: Exposure with intention to abandon the child

- Both the abandonment and attempt can be punishable.

- Correct Answer: Option 3: Suicide

- Suicide is not punished, but attempts have historically been subject to punishment.