The electrochemical equivalent of platinum is 5.0 x 10^-7kgC^-1 to plate-out 1.0kg of platinum, a current of 100A must be passed through an appropriate vessel for

• A.5.6 hours
• B.56 hours
• C.1.4 x 10^{4 hours}
• D.2.0 x 10^{4 hours}
• E.