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
The number of tonsillar crypts is usually: 
Select and explain. 
A. 5-Feb, B. 15-Dec, C. 50-100, D. 1500-3000
B: 15-Dec
Answer: B: 15-Dec 
Explanation: Tonsillar crypts are pockets or folds that occur naturally in the tonsils. The average adult tonsil has anywhere from 10 to 20 crypts. Crypts in the tonsils are usually small and debris free