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
Feature in otosclerosis include - 
Select and explain. 
A. Sounds not heard in noisy environment, B. Normal tympanum, C. More common in males, D. Malleus is most commonly affected
B: Normal tympanum
Answer: B: Normal tympanum 
Explanation: None