This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypopharynx, Subject name: ENT
[{'content': 'A tonsil bed is formed by superior constrictor and styloglossus muscle . Which of the following is not the component of tonsillar bed ? \nSelect and explain. \nA. Submandibular salivary gland, B. Lateral pterygoid muscle, C. IX nerve, D. Styloid process', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lateral pterygoid muscle has no relation with tonsil bed . Bed of the tonsil :-It is formed by following structures- Superior constrictor muscle Styloglossus muscle Lateral pterygoid muscle- Upper head arises from the infratemporal surface Lower head arises from the lateral surface of the lateral pterygoid plate', 'role': 'assistant'}]