This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following anticholinergic is used for peptic ulcer disease \nSelect and explain. \nA. Dicyclomine, B. Methacoline, C. Pirenzepine, D. Aclidinium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pirenzepine is a M1 receptor antagonist.\nAcetyl choline acts on M1 receptors present on gastric glands to increase acid secretion and Pirenzepine is used to treat peptic ulcer disease by blocking these receptors.', 'role': 'assistant'}]