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
All are subjective tests for audiometry except 
Select and explain. 
A. Tone decay, B. Impedance audiometry, C. Speech audiometry, D. Pure tone audiometry
B: Impedance audiometry
Answer: B: Impedance audiometry 
Explanation: It is an objective test, widely used in clinical practice and is paicularly useful in children. It consists of: (a) Tympanometry (b) Acoustic reflex measurements. Ref: Dhingra; 6th Edition; pg no 24