After Balancing the Following Reaction Under Acidic Conditions , What

After balancing the following reaction under acidic conditions , what is the coefficient for the species, BiO₃^{1 -} ?
Mn²⁺ (aq) + BiO₃^{1 -} (aq) →Bi³⁺ (aq) + MnO₄^{1 -} (aq) [Acidic conditions]

A) 1
B) 2
C) 3
D) 5
E) 6