This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otosclerosis, Subject name: ENT
In majority of cases with otosclerosis the tympanic membrane is: 
Select and explain. 
A. Normal, B. Flamingo pink, C. Blue, D. Yellow
A: Normal
Answer: A: Normal 
Explanation: (a) Normal(Ref. Shambaugh, 6th ed., 531)In 90% patients of otosclerosis the tympanic membrane appears normal, i.e. pearly white.In 10% cases which are active tympanic membrane is flamingo pink.Blue TM is a feature of glue ear because of cholesterol granuloma.Yellow TM is not seen in any condition