AIPMT MAINS 2012 Physics First Law of Thermodynamics Multiple Correct Question

An ideal gas goes from state A to state B via three different processes as indicated in the P⁻V diagram: If Q₁, Q₂, Q₃ indicate the heat a absorbed by the gas along the three processes and ΔU₁, ΔU₂, ΔU₃ indicate the change in internal energy along the three processes respectively, then