$A$ steady current of $5 \, A$ is maintained for $45 \, min$. During this time,it deposits $4.572 \, g$ of zinc at the cathode of a voltameter. The $E.C.E.$ of zinc is:

• A
  $3.387 \times 10^{-4} \, g/C$
• B
  $3.387 \times 10^{-4} \, C/g$
• C
  $3.384 \times 10^{-3} \, g/C$
• D
  $3.394 \times 10^{-3} \, C/g$