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: Anatomy
Muscle supplied by glossopharyngeal nerve: 
Select and explain. 
A. Platysma, B. Stylopharyngeus, C. Styloglossus, D. Genioglossus
B: Stylopharyngeus
Answer: B: Stylopharyngeus 
Explanation: Stylopharyngeus is the only muscle in the pharynx innervated by the glossopharyngeal nerve (CN IX) and is done by its motor branch, which supplies special visceral efferent (SVE) fibers to it.