When a solid body is partially or completely immersed in a fluid, the fluid exerts an upward force on the body. The magnitude of the force is equal to 1. the mass of the body 2. the weight of the displaced fluid by the body. Which of the above is/are correct?

This is Archimedes' principle, which states that when a body is partially or completely immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the body. Statement 1 is incorrect because the upward force is not equal to the mass of the body (a heavy body sinks despite buoyancy). Statement 2 is correct as it correctly states Archimedes' principle. Only statement 2 is correct.