A) Only A is true.
B) Only B is true.
C) Both A and Bore true.
D) Both A and B are false.
Correct Answer: D
Solution :
We cannot hear all the sound that is being made in the universe. Human beings can hear only those things that are in the range of 20 - 20000 Hertz. Human beings can only see the wavelengths depicted by VIBGYOR. Beyond these, humans cannot see.You need to login to perform this action.
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