Which of the following statements is correct about floatation?

According to the principle of floatation, when a body is partially or partly immersed in fluid then the weight of the displaced fluid is equal to the weight of the floating body.

Let's look at one example to understand:
When a cube of ice is immersed in water, its 9/10th part is floating inside the water.
That means if ice of 1m³ is immersed in water, 0.9m³ will be inside the water.
$\mathrm{Volume} \mathrm{of} \mathrm{ice}= 1{\mathrm{m}}^3$
Therefore,
 $\mathrm{Volume} \mathrm{of} \mathrm{the} \mathrm{submerged} \mathrm{part} \mathrm{of} \mathrm{ice}= 0.9{\mathrm{m}}^3$
According to the principle of displacement, the volume of ice submerged inside the water will displace water equal to the volume of the ice.
Therefore, 
$\mathrm{The} \mathrm{volume} \mathrm{of} \mathrm{displaced} \mathrm{water}= 0.9{\mathrm{m}}^3$

$\mathrm{Mass}= \mathrm{volume} \mathrm{X} \mathrm{density}$
$\mathrm{Density} \mathrm{of} \mathrm{ice}= 900\mathrm{kg}/\mathrm{m}{3 }^{ }$
$\mathrm{Density} \mathrm{of} \mathrm{water}= 1000\mathrm{kg}/\mathrm{m}{3 }^{ }$
$\mathrm{Weight} \mathrm{of} \mathrm{ice}= \mathrm{volume} \mathrm{of} \mathrm{ice} \mathrm{X} \mathrm{density} \mathrm{of} \mathrm{ice}$
$\mathrm{Weight} \mathrm{of} \mathrm{ice}= 1 \mathrm{x} 900= 900\mathrm{kg}$
$\mathrm{Weight} \mathrm{of} \mathrm{displaced} \mathrm{water}= \mathrm{volume} \mathrm{of} \mathrm{displaced} \mathrm{water} \mathrm{X} \mathrm{density} \mathrm{of} \mathrm{water}$
$\mathrm{Weight} \mathrm{of} \mathrm{displaced} \mathrm{water}= 0.9 \mathrm{X} 1000 = 900\mathrm{kg}$
$\mathrm{Weight} \mathrm{of} \mathrm{ice}= \mathrm{weight} \mathrm{of} \mathrm{displaced} \mathrm{water}$