At constant volume and temperature conditions, the rate of diffusion \[D_{A}and D_{B}\]   of gases A and B having densities \[p_{A}and p_{B}\]   are related by the expression
a) \[D_{A}=\left[D_{B}\frac{P_{A}}{P_{B}}\right]^{1\diagup2}\]
b) \[D_{A}=\left[D_{B}\frac{P_{B}}{P_{A}}\right]^{1\diagup2}\]
c) \[D_{A}=D_{B}\left[\frac{P_{A}}{P_{B}}\right]^{1\diagup2}\]
d) \[D_{A}=D_{B}\left[\frac{P_{B}}{P_{A}}\right]^{1\diagup2}\]

Answer: d
Explanation: