MCQ
The $IUPAC$ name of ${K_4}\left[ {Fe{{\left( {CN} \right)}_6}} \right]$ is
- ✓Potassium hexacyanoferrate $(II)$
- BPotassium ferrocyanide
- CTetrapotassium hexacyanoferrate $ (II)$
- DTetrapotassium ferroushexacyanide $(II)$
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$C{u_{\left( s \right)}} + 2Ag_{\left( {aq} \right)}^ + \to Cu_{\left( {aq} \right)}^{2 + } + 2A{g_{\left( s \right)}}$

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 :