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Ultrasonic, infrasonic and audio waves t...

Ultrasonic, infrasonic and audio waves travel though a medium with speeds `V_(u), V_(i)` and `V_(a)` respectively then :-

A

`v_(a) = v_(i) = a_(a)`

B

`v_(u) gt v_(a) gt v_(i)`

C

`v_(u) lt v_(a) lt v_(i)`

D

`v_(a) lt v_(u) and v_(u) = v_(i)`

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The correct Answer is:
A
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