Consider the Redox Reaction of Triiodide and Oxygen:I₃^- + O₂ $\rarr$

Consider the redox reaction of triiodide and oxygen:I₃^- + O₂ $\rarr$ I₂ + OH^- (basic solution) If the coefficient of I₃^- is 4 in the balanced equation, what is the coefficient of OH^-?

A) 2
B) 4
C) 6
D) 8
E) 10