Which of the following is used as an acetylcholinesterase inhibitor?
Y-BHC
Endosulfan
Malathion
Aldrin
Correct answer: Malathion
Solution
Malathion is an organophosphate insecticide, and organophosphates inhibit acetylcholinesterase by preventing acetylcholine breakdown. The other options are not the standard acetylcholinesterase inhibitors in this list.