A liquid has vapour pressure `35xx10^(3)Nm^(-2)` at 298 K. If the solution contains 0.2 mole fraction of a solute, the vapour pressure of the solution will be
A. `2.8xx10^(3)Nm^(-2)`
B. `7xx10^(3)Nm^(-2)`
C. `7.0xx10^(4)Nm^(-2)`
D. `28xx10^(3)Nm^(-2)`