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 can be used treat post operative gastric paresis \nSelect and explain. \nA. Atropine, B. Methacoline, C. Bethanecol, D. Oxtremorine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Bethanechol is a parasympathomimetic that acts on M3 receptors of Gastric smooth muscle to increase gut motility.', 'role': 'assistant'}]