The vessels A and B of equal volume and weight are immersed in water to a depth h.The vessel A has an opening at the bottom through which water can enter.If the work done in immersing A and B are $W_A$ and $W_B$ respectively,then

Question

$\begin{array}{1 1}W_A=W_B\\W_A < W_B\\W_A > W_B\\W_A > = < W_B\end{array} $