JEE Main 2025 Chemistry question

A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B. The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg. The vapour pressure of pure B and the least volatile component of the solution, respectively, are

• (1)600 mm Hg, B
• (2)600 mm Hg, ACorrect
• (3)1400 mm Hg, A
• (4)1400 mm Hg, B