At $$80^\circ C$$, the vapour pressure of pure liquid '$$A$$' is 520 mmHg and that of pure liquid '$$B$$' is 1000 mmHg. If a mixture solution of '$$A$$' and '$$B$$' boils at $$80^\circ C$$ and 1 atm pressure, the amount of '$$A$$' in the mixture is (1 atm = 760 mmHg)

A

52 mol percent

B

34 mol percent

C

48 mol percent

D

50 mol percent