A block of volume `V` and density `sigma_(b)` is placed in liquid of density `sigma_(1)(sigma_(1) gt singma_(b))`, then block is moved upward upto a height `h` and it is still in liquid. The increase in gravitational energy of the block is :A. `sigma_(b) Vgh`B. `(sigma_(b) + sigma_(1))Vgh`C. `(sigma_(b) - sigma_(1))Vgh`D. none of these

A block of volume `V` and density `sigma_(b)` is placed in liquid of d

1.	A block of volume `V` and density `sigma_(b)` is placed in liquid of density `sigma_(1)(sigma_(1) gt singma_(b))`, then block is moved upward upto a height `h` and it is still in liquid. The increase in gravitational energy of the block is :A. `sigma_(b) Vgh`B. `(sigma_(b) + sigma_(1))Vgh`C. `(sigma_(b) - sigma_(1))Vgh`D. none of these
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