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
Which of the following Parasympathomimetic drug is used to treat Xerostomia 
Select and explain. 
A. Pirenzepine, B. Bethanecol, C. Cevimeline, D. Tolterodine
C: Cevimeline
Answer: C: Cevimeline 
Explanation: Cevimeline is a muscarine agonist that can increase salivary secretions.