The total vapour pressure of a binary solution is given by  $P=(80X_A+240X_B)mmHg$
Where $X_{A}and{X}_B$ are the mole fractions of components A and B in the liquid mixture Choose the correct statement(s) from the following:
 

For option (A)
$$\begin{gathered} P=80X_A+240X_B =80X_A+240(1-X_A) \\ =240+X_A(80-240) =240-160X_A \end{gathered}$$     
$\therefore$ V.P of solution is less than 240 mm Hg which is V.P of pure (B)
For option (B)
 $$\begin{gathered} P=80X_A+240X_B =80(1-X_B)+240X_B \\ =80+X_B(240-80) =80+160X_B \end{gathered}$$    
$\therefore$ V.P of solution is less than 80 mm Hg which is V.P of pure (A)
For option (C)
$P=80X_A+240X_B$    For pure (A),  $X_A=1and{X}_B=0$
V.P of pure (A) = 80 mm Hg   Similarly
 V.P of pure (B) =240 mm Hg