Explanation:

- The sentence discusses people who want mercy but aren't merciful themselves.

- Option 1: Paradoxical () - This means having contradictory qualities. It's fitting because expecting mercy without being merciful is indeed a contradiction.

- Option 2: Strange - This means unusual or surprising. It doesn't fully capture the contradiction.

- Option 3: Stupid - This suggests a lack of intelligence. It doesn't capture the essence of contradiction.

- Option 4: Repulsive - This means causing intense distaste or disgust. It doesn't relate to the contradictory nature.

The word "paradoxical" best describes the situation because it highlights the contradiction.