A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will

Maintain the same size and shape

A hydrogen-inflated polythene balloon is released from the surface of

1.	A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
A.	Decrease in size
B.	Flatten into a disc-like shape
C.	Increase in size
D.	Maintain the same size and shape
Answer» D. Maintain the same size and shape