Option 1: (A)-(I), (B)-(II), (C)-(III), (D)-(IV) -> Incorrect matching: "creditable people" doesn't fit sentence A, and "conscious" doesn't work for sentence B.
Option 2: (A)-(III), (B)-(I), (C)-(IV), (D)-(II) -> Correct matching: "Credulous people" (gullible) get deceived, "creditable performance" (praiseworthy), "conscience" (moral sense) causes guilt, "conscious of" (aware of) an intruder.
Option 3: (A)-(I), (B)-(II), (C)-(IV), (D)-(III) -> Incorrect: "creditable people" and "conscious performance" don't make sense contextually.
Option 4: (A)-(III), (B)-(IV), (C)-(I), (D)-(II) -> Incorrect: "conscience performance" and "creditable made me confess" are grammatically and contextually wrong.
Hence, Option 2: (A)-(III), (B)-(I), (C)-(IV), (D)-(II) -> This correctly pairs credulous (easily deceived), creditable (worthy of praise), conscience (moral sense), and conscious (aware) with their respective sentences -> correct