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
Most common site of otosclerosis is: 
Select and explain. 
A. Round window, B. Oval window, C. Utricle, D. Ossicles
B: Oval window
Answer: B: Oval window 
Explanation: The most common location of involvement of otosclerosis is the bone just anterior to the oval window at a small cleft known as the fissula ante fenestram.