The MnO₄^- Is Often Used to Analyze for the Fe²⁺ $\to$

The MnO₄^- is often used to analyze for the Fe²⁺ content of an aqueous solution via the reaction
MnO₄^-(aq) + Fe²⁺(aq) + H⁺(aq) $\to$ Fe³⁺(aq) + Mn²⁺(aq) + H₂O(l)
What is the ratio of Fe²⁺ : MnO₄^- in the balanced equation?

A) 1 : 1
B) 2 : 1
C) 3 : 1
D) 4 : 1
E) 5 : 1