A body is floating in a liquid in a beaker. If the whole system falls freely under gravity, the upthrust on the body due to the liquid is

The system consisting of the body floating in water in the beaker is in a state of weightlessness when it is falling freely under gravity. If the body is initially floating (while starting to fall, say, from rest) it will continue to float during the free fall. The body falls along with the displaced liquid and the immersed portion of the body remains unchanged. However, the weight of the immersed portion of the body and the weight of the liquid displaced both becomes zero during the free fall. The upthrust on the body, therefore, becomes zero. The weight of the body in air also becomes zero because it becomes weightless. Hence, all the four options (a), (b), (c) and (d) are correct