Answer:
Water of solution A will go through membrane until solution B.
Explanation:
That phenomenon occurs by mass transfer.
Mass transfer is the movement from a location to another that occurs when you have mass gradient. In a membrane with different concentration solutions the system will try to equal both concentrations.
In the problem, Solution B is more concentrated than A. Thus, water will transport from solution A to solution B increasing concentration of A and decreasing concentration of B until the system stay in equilibrium.
I hope ot helps!