When r, p and M represent rate of diffusion, pressure and molecular mass, respectively, then the ratio of the rates of diffusion `(r_A//r_B)` of two gases A and B, is given

Options

A. `(P_A//P_B)^(1//2)(M_A//M_B)`
B. `(P_A//P_B)(M_B//M_A)^(1//2)`
C. `(P_A//P_B)^(1//2)(M_B//M_A)`
D. `(P_A//P_B)(M_A//M_B)^(1//2)`