Atropine is useful in organophosphate poisoning because it -
Reactivates acetylcholinesterase
Competes with acetylcholine release
Binds with both nicotinic and muscarinic acetylcholine receptors
Is a competitive antagonist of acetylcholine
Ans. is 'd' i.e., Is a competitive antagonist of acetylcholine o Atropine acts as competitive antagonist at muscarinic receptors. It has no activity on nicotinic receptors and has nothing to do with Ach release.