5 moles of liquid X and 10 moles of liquid Y make a solution having a total vapour pressure 70 torr. The vapour pressures of pure X and pure Y are 64 torr and 76 torr respectively. Which of the following is true regarding the described solution?

• A. The solution shows positive deviation
• B. The solution shows negative deviation
• C. The solution is ideal
• D. The solution has volume greater than the sum of individual volumes