Step 1: Acetamiprid is a neonicotinoid acting on sucking pests, so A - (III); this rules out options (1) and (4).
Step 2: Cypermethrin is a synthetic pyrethroid acting as a contact/stomach poison, so B - (I); this rules out option (3).
Step 3: The remaining match (A)-(III), (B)-(I), (C)-(IV), (D)-(II) confirms option (2) is correct.