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Question

An observer moves towards a stationary source of sound with one-fifth of the speed of sound. The wavelength and frequency of the source omitted are λ and f respectively. The apparent frequency and wavelength recorded by the observer are

A
0.85f,0.8λ
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B
1.2f,1.2λ
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C
1.2f,λ
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D
f,1.2λ
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