Option 1 -> Incorrectly matches "adherent" with reactionary and "fanatic" with adherent.
Option 2 -> Incorrectly matches "fanatic" with radical and "radical" with reactionary.
Option 3 -> Correctly matches: Adherent (supporter), Fanatic (strong believer), Radical (extreme change advocate), Reactionary (opposes change).
Option 4 -> Incorrectly matches "adherent" with reactionary and "radical" with adherent.
Hence, Option 3: (A) - (IV), (B) - (I), (C) - (II), (D) - (III) -> An adherent supports ideas/parties, a fanatic has extreme enthusiasm, a radical seeks fundamental change, and a reactionary resists progress or new ideas -> correct