(A) Recluse (III) -> A recluse is someone who lives in isolation, withdrawn from society.
(B) Irrevocable (IV) -> Irrevocable means a decision or action that cannot be reversed or undone.
(C) Pacifist (I) -> A pacifist is someone who believes in peace and opposes war and violence.
(D) Deadlock (II) -> A deadlock is a stalemate where no progress can be made due to opposing parties.
Hence, Option 1: (A) - (III), (B) - (IV), (C) - (I), (D) - (II) -> This matching correctly pairs each definition with its corresponding vocabulary word based on standard English meanings -> correct