List I in the question represents various crops while list II represents common pests that affect these crops. The main intention is to correctly match each crop with its corresponding pest. The correct answer is option 3.
To understand this, let`s analyze each crop and pest pairing.
In option 3:
I. Rice (B) Gundhi bug - Gundhi bugs are notorious pests that harm paddy crops like rice.
II. Wheat (A) Aphid - Aphids are common pests of many crops including wheat.
III. Sugarcane (D) Top shoot borer moth - The larval stages of the Top shoot borer moth are highly destructive pests of sugarcane.
IV. Gram (C) Greasy cutworm - Greasy cutworms are pests of many crops, including gram.
The other options do not correctly pair the crops with their corresponding pests, hence, they are incorrect. For instance, in option 1, Rice is incorrectly paired with the Greasy cutworm, Wheat with Gundhi bug, Sugarcane with Aphid and Gram with the Top shoot borer moth. Similarly, incorrect pairings are present in options 2 and 4 as well.