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: ENT
Bed of tonsil is formed by ? 
Select and explain. 
A. Superior constrictor, B. Middle constrictor, C. Inferior constrictor, D. Platysma
A: Superior constrictor
Answer: A: Superior constrictor 
Explanation: Ans. is 'a' i.e., Superior constrictor Tonsillar bed is formed by the following : Pharyngobasilar fascia Buccopharyngeal fascia Glossopharyngeal nerve Superior constrictor muscle Styloglossus muscle