Suppose the Redox Reaction in a Certain Zinc-Carbon Battery Is $\to$

Suppose the redox reaction in a certain zinc-carbon battery is Zn + 2 MnO₂ + 2 NH₄Cl $\to$ Mn₂O₃ + Zn(NH₃) ₂Cl₂ + H₂O.The battery is rated at 4.5 A . hr at 1.5 V.How many grams of zinc must be oxidized to deliver this much charge?

A) 11 g Zn
B) 1.8 g Zn
C) 3.7 g Zn
D) 8.2 g Zn
E) 5.5 g Zn