$$\text{Br}_2$$ disproportionates to $$\text{Br}^-$$ and $$\text{BrO}_3^-$$ in a hot alkaline solution as $$3\text{Br}_2 + 6\text{OH}^- \rightarrow 5\text{Br}^- + \text{BrO}_3^- + 3\text{H}_2\text{O}$$. The equivalent weight of $$\text{Br}_2$$, where M is the molar mass of $$\text{Br}_2$$, is

A

$$\frac{M}{5}$$

B

$$\frac{M}{6}$$

C

$$\frac{3M}{5}$$

D

$$\frac{5M}{3}$$