$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}
\end{array}} \\
{^ - O - S - O - S - {O^ - }} \\
{\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,} \\
{\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}
\end{array}$
No. $S-S$ linkage
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Statement $I$ : Picric acid is $2, 4, 6$-trinitrotoluene.
Statement $II$ : Phenol$-2, 4-$disulphuric acid is treated with conc. $\mathrm{HNO}_3$ to get picric acid.
In the light of the above statement, choose the most appropriate answer from the options given below :
$A$ is