Chlorine undergoes disproportionation in alkaline medium as shown below :
$$aCl_2(g) + bOH^-(aq) \rightarrow cClO^-(aq) + dCl^-(aq) + eH_2O(l)$$
The values of $$a, b, c$$ and $$d$$ in a balanced redox reaction are respectively :

A

$$1, 2, 1$$ and $$1$$

B

$$2, 2, 1$$ and $$3$$

C

$$3, 4, 4$$ and $$2$$

D

$$2, 4, 1$$ and $$3$$