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
Retraction of tympanic membrane touching the promontory. It is called ? 
Select and explain. 
A. Mild retraction, B. Severe retraction, C. Atelectasis, D. Adhesive otitis
C: Atelectasis
Answer: C: Atelectasis 
Explanation: Ans. is 'c' i.e., Atelectasis Tympanic membrane retraction The retracted segment of eardrum is often known as a retraction pocket. The terms "atelectasis" or sometimes "adhesive otitis media" can be used to describe retraction of a large area of the pars tensa.