For New Delhi, it is time to re-examine its Pakistan policy and reduce the suspicion that it is trying to torpedo the talks.

Answer: Option A

Attack : take aggressive military action against (a place or enemy forces) with weapons or armed force.
Quiet : making little or no noise.
Weaken : make or become weaker in power, resolve, or physical strength.
Refute : prove (a statement or theory) to be wrong or false; disprove.
Torpedo : attack or sink (a ship) with a torpedo or torpedoes.

Synonym of Torpedo is Attack