If at same temperature and pressure, the densities for two diatomic gases are respectively d1 and d2, then the ratio of velocities of sound in these gases will be

(1) $\sqrt{\frac{{d}_{2}}{{d}_{1}}}$

(2) $\sqrt{\frac{{d}_{1}}{{d}_{2}}}$

(3) d1d2

(4) $\sqrt{{d}_{1}{d}_{2}}$

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