This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ANS, Subject name: Pharmacology
[{'content': 'Which of the following drug possess maximum action on nicotinic receptors? \nSelect and explain. \nA. Bethanechol, B. Carbachol, C. Pilocarpine, D. Methacholine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drugs Acts on Action Indication Pilocarpine M3, Pupil Miosis Glaucoma Bethanechol M3, Bladder Increase outflow Atonic bladder Carbachol Nicotinic , muscarinic Methacholine M2 Cardiac suppression Tachycardia, Arrhythmias', 'role': 'assistant'}]