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
Impedance audiometry is for pathology of 
Select and explain. 
A. External ear, B. Middle ear, C. Mastoid air cell, D. Inner ear
B: Middle ear
Answer: B: Middle ear 
Explanation: It is done for the pathology of the middle ear. It is a test for conductive deafness. It is an objective test, widely used in clinical practice and is paicularly useful in children. It consists of: Tympanometry Acoustic reflex measurements. Ref: Dhingra; 6th Edition; pg no 24