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
Frequency range in normal human hearing is? 
Select and explain. 
A. 20-4000 Hz, B. 20-8000 Hz, C. 20-10000 Hz, D. 20-20000 Hz
D: 20-20000 Hz
Answer: D: 20-20000 Hz 
Explanation: Ans. (d) 20-20000 HzRef: Dhingra 4th ed p 16, 21