Equal mass of a soute are dissolved in equal mass of two solvents A and B and formed very dilute solution. The relative lowering of vapour pressure for the solution B has twice the relative lowering of vapour pressure for the solution A. If `m_(A) "and" M_(B)` are the molecules mass of solventds A and B respectively, then :

Options

A. `M_(A) = M_(B)`
B. `M_(A) = M_(B) //2`
C. `M_(A) = 4M_(B)`
D. `M_(A) = 2M_(B)`

Answer

B