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An observer moves towards a stationary s...

An observer moves towards a stationary source of sound with a speed `((1)/(5))`th of the speed of sound. The wavelength and frequency of the source emitted are `lamda` and f, respectively. The apparent frequency and wavelength recorded by the observer are, respectively.

A

1.2f,`1.2` lambda

B

`1.2f, lambda `

C

f,`1.2 lambda `

D

0.8f , `0.8` lambda

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The correct Answer is:
B
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