If at same temperature and pressure, the densities for two diatomic gases are respectively \[{{d}_{1}}\] and \[{{d}_{2}}\], then the ratio of velocities of sound in these gases will be [CPMT 2001]

• A.   \[\sqrt{\frac{{{d}_{2}}}{{{d}_{1}}}}\]  
• B.   \[\sqrt{\frac{{{d}_{1}}}{{{d}_{2}}}}\]
• C.   \[{{d}_{1}}{{d}_{2}}\]       
• D.   \[\sqrt{{{d}_{1}}{{d}_{2}}}\]