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 for the initiation of otosclerosis is: 
Select and explain. 
A. Footplate of stapes, B. Margins of stapes, C. Fissula antefenestrum., D. Fissula post fenestram
C: Fissula antefenestrum.
Answer: C: Fissula antefenestrum. 
Explanation: Ans. C Fissula antefenestrum.Most common type of otosclerosisMost common site of otosclerosisMost common site for stapedial otosclerosisMost common site for cochlear otosclerosisStapedial otosclerosisFissula ante fenestram (. just in front of oval window)Fissula ante fenestram (. just in front of oval window)Round window