According to Graham's law, at a given temperature the ratio of rates of diffusion `r_(A)//r_(B)` of gases `A` and `B` is given by .

Options

A. `( P_(A))/( P_(B))((M_(A))/(M_(B)))^(1//2)`
B. `((M_(A))/( M_(B)))((P_(A))/(P_(B)))^(1//2)`
C. `(P_(A))/(P_(B))((M_(B))/(M_(A)))^(1//2)`
D. `(M_(A))/( M_(B))((P_(B))/(P_(A)))^(1//2)`

Answer

C