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: Surgery
The most common site of the internal opening of a branchial fistula is at the - 
Select and explain. 
A. Lateral nasopharyngeal wall, B. Fossa of Rosenmuller, C. Gingivo - labial sulcus, D. Tonsillar fossa
D: Tonsillar fossa
Answer: D: Tonsillar fossa 
Explanation: Ans. is 'd' i.e., Tonsillar fossa