The speed of sound in oxygen $(O_2)$ at a certain temperature is $460 ms^{-1}$. The speed of sound in helium (He) at the same temperature will be (assumed both gases to be ideal)

Question

( A ) $460 ms^{-1}$
( B ) $650 ms^{-1}$
( C ) No option is correct
( D ) $500 ms^{-1}$