In the above sequence of reactions, A and D, respectively, are:
Question:

In the above sequence of reactions, $\mathrm{A}$ and $\mathrm{D}$, respectively, are:

1. $\mathrm{KI}$ and $\mathrm{KMnO}_{4}$

2. $\mathrm{MnO}_{2}$ and $\mathrm{KIO}_{3}$

3. $\mathrm{KIO}_{3}$ and $\mathrm{MnO}_{2}$

4. $\mathrm{KI}$ and $\mathrm{K}_{2} \mathrm{MnO}_{4}$

Correct Option: , 2

Solution: