This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Most common site for the initiation of otosclerosis is 
Select and explain. 
A. Food plate of stapes, B. Margins of stapes, C. Fissula ante fenestrum, D. Fissula post fenestrum
C: Fissula ante fenestrum
Answer: C: Fissula ante fenestrum 
Explanation: In stapedial otosclerosis which is the most common variety, the lesion stas just in front of the oval window in an area called "fissula ante fenestram". Ref: Diseases of EAR, NOSE, THROAT by PL Dhingra; 7th Edition; page no.95