An ice cube is floating in water above which a layer of lighter oil is poured. As the ice melts ...

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An ice cube is floating in water above which a layer of lighter oil is poured. As the ice melts completely, the level of interface and the upper most level of oil will respectively
(a) rise and fall
(b) fall and rise
Water
(c) not change and no change
(d) not change and fall
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