A beaker exactly full of water has an ice piece floating on it. As the cube melts what happens to the water level if
(a) the cube contains an air bubble,
(b) lead piece and
(c) a cork piece.
A. it remains unchanged if the tube contains an air bubble
B. the level falls if the cube contains some lead pieces inside it
C. the level will rise if the cube contains some cork pieces inside
D. the level remains the same if the cube contains some cork pieces inside it
