After Balancing the Following Reaction Under Acidic Conditions , What

After balancing the following reaction under acidic conditions , what is the coefficient for the species, Cl^{1 -} ?
MnO₄^{1 -} (aq) + Cl^{1 -} (aq) →Mn²⁺ (aq) + Cl₂ (g) [Acidic conditions]

A) 1
B) 2
C) 5
D) 7
E) 10