A block of ice (specific gravity $S_{i-}=0.90$) is floating in a container having two immiscible liquids (one of specific gravity $S=0.50$ and other is water) as shown in the figure. ($H_1 ,H_2$ are heights of water, other liquid columns respectively.) Now the ice block melts completely, then

Density of ice is in between that of water and liquid.Pressure at ice -liquid  interface is more than the pressure at liquid -water interface .Due to this volume of water displaced by ice is less than the volume of water displaced by the ice block when it freely floats on water surface . Decrease in $H_{2 }more than the increase in H_{1 .}$