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 Parasympathomimetic drug is used to treat Xerostomia \nSelect and explain. \nA. Pirenzepine, B. Bethanecol, C. Cevimeline, D. Tolterodine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cevimeline is a muscarine agonist that can increase salivary secretions.', 'role': 'assistant'}]