Question: 
In the above sequence of reactions, $\mathrm{A}$ and $\mathrm{D}$, respectively, are:
$\mathrm{KI}$ and $\mathrm{KMnO}_{4}$
$\mathrm{MnO}_{2}$ and $\mathrm{KIO}_{3}$
$\mathrm{KIO}_{3}$ and $\mathrm{MnO}_{2}$
$\mathrm{KI}$ and $\mathrm{K}_{2} \mathrm{MnO}_{4}$
Correct Option: , 2
Solution:
