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
[{'content': 'All are subjective tests for audiometry except \nSelect and explain. \nA. Tone decay, B. Impedance audiometry, C. Speech audiometry, D. Pure tone audiometry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]