This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Telenzepine acts on which receptors? \nSelect and explain. \nA. M2, B. M1, C. M3, D. Nm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pirenzepine and telenzepine are selective m1 blockers used in peptic ulcer by inhibiting acid secretion are synthetic atropine substitutes Ref: KDT 6th ed pg 113', 'role': 'assistant'}]