Pressure over ideal binary liquid mixture containing 10 moles each of liquid A and B is gradually decreased isothermally. If P°A = 200 mm Hg and P°B = 100 mmHg. Find the pressure at which half of the liquid is converted into vapour.
A.150 mm Hg
B. 166.5 mmHg
C. 133 mmHg
D. 141.4 mmHg