Two immiscible liquids $A$ and $B$ are kept in an U-tube. If the density of liquid $A$ is smaller than the density of liquid $B$, then the equilibrium situation is
KVPY 2009, Diffcult
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(c)
As density of $B$ is more than that of $A$, a small volume of $B$ weighs equals to a large volume of $A$.
Hence, if we draw a horizontal line from bottom of column of $A$, then a lesser
length column of $B$ must appear above this line in other limb of U-tube. It is as shown below.
This is shown in option $(c)$.
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Figure: $Image$
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$(D)$ The force due to gravity and the force due to viscosity of the liquid
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