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If the pressure, temperature and density...

If the pressure, temperature and density of an ideal gas are denoted by P.T and `rho` respectively. The velocity of sound in the gas is

A

proportional to `sqrt(P)` when T is constant

B

proportional to `sqrt(T)`

C

proportional to `sqrt(P)`. When `rho` is constant

D

proportional to T.

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