Two objects A and B are thrown upward simultaneously with the same speed. The mass of A is greater than the mass of B. Suppose the air exerts a constant and equal force of resistance on the two bodies.
∵ the objects are thrown vertically upward, the net force acting on the bodies only due to gravity and the acceleration due to gravity is independent mass of the body since it acts on the individual points of the body. Thus, both the bodies will move to the same height given resistance due to air is same for both. Option A is ∴ correct.