This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Pharmacology
[{'content': 'Mechanism of action of atropine in treatment of organophophate poisoning is? \nSelect and explain. \nA. It inhibits secretion of acetylcholine, B. It is reactivator of acetylcholine esterase enzyme, C. It has antimuscarinic activity, D. It is agonist of acetylcholine receptors', 'role': 'user'}, {'content': "Answer: C \nExplanation: Organophosphates AcHE inhibitors (acetylcholine cannot be broken) Level of acetyl choline increases Stimulate nicotinic & muscarinic receptors Over activity of M1- acidity M2- bradycardia M3- bronchoconstriction, secretion, diarrhea & urination Atropine is DOC for organophosphate poisoning But atropine doesn't block the nicotinic receptors (muscle weakness)", 'role': 'assistant'}]