The principle of floatation states that a body floats in a liquid if the weight of the liquid displaced is equal to the weight of the body. This principle is based on Archimedes' principle, which states that when an object is immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

Explanation:
- According to the principle of floatation, the weight of the liquid displaced is the same as the weight of the body. This means that the upward buoyant force acting on the body is equal to the weight of the body.
- When the weight of the liquid displaced is less than the weight of the body, the buoyant force is not strong enough to counteract the weight, and the body sinks.
- On the other hand, when the weight of the liquid displaced is more than the weight of the body, the buoyant force is greater than the weight, and the body rises to the surface.
- In both cases, the body does not float, as the principle of floatation states that the weight of the liquid displaced must be equal to the weight of the body.
- Therefore, the weight of the liquid displaced is the same as the weight of the body, as stated in option 'C'.

Key Points:
- Principle of floatation states that a body floats in a liquid if the weight of the liquid displaced is equal to the weight of the body.
- Archimedes' principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.
- If the weight of the liquid displaced is less than the weight of the body, the body sinks. If it is more, the body rises. But for floating, the weight of the liquid displaced must be equal to the weight of the body.