An electroplating solution contains vanadium (50.9415 g/mol), which is a metallic element that can exist in solution in at least four oxidation states. A current of 1.50 A operates on the electrolysis cell for 30.0 minutes. During this time 0.285 g of V is deposited on the cathode. What is the oxidation state of the vanadium in solution?
a) +2
b) +3
c) +4
d) +5