It is found that the measured weight (`ne` zero) of an empty thin polythene bag has not changed when the bag in filled with air. Two students were asked reason for this :
Saara: Air is so light that weighing machine need to have large precision to measure weight of filled air.
Vasu : Force of buoyance increases by the same amount as the weight of added air .
A. Saara is correct , Vasu is wrong
B. Vasu is correct , Saara is wrong
C. Both are correct
D. Both are wrong
