Objective question in Solutions

The following is a graph plotted between the vapor pressure of two volatile liquids against their respective mole fractions
 Which of the following combinations are correct?

(1) When {{x}_{A}}=1~and~{{x}_{B}}=0,~then~p=p_{A}^{0}
(2) When {{x}_{B}}=1~and~{{x}_{A}}=0~then~p>p_{A}^{0}
(3) When {{x}_{A}}=1~and~{{x}_{B}}=0~then~p<p_{B}^{0}
(4) When {{x}_{B}}=1~and~{{x}_{A}}=0~then~p=p_{B}^{0}

Which of them is incorrect? a) 1 b) 2 c) 3 d) All are correct statements

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