A big explosion on the moon cannot be heard on the earth because [C...

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A big explosion on the moon cannot be heard on the earth because
[CPMT 1972; AFMC 2005]
\( \mathrm{P} \)
(a) The explosion produces high frequency sound waves
W which are inaudible
(b) Sound waves require a material medium for propagation
(c) Sound waves are absorbed in the moon's atmosphere
(d) Sound waves are absorbed in the earth's atmosphere
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