d
\(\mathrm{SO}_{2}\) molecule has one \(\mathrm{p} \pi-\mathrm{p} \pi\) bond and one \(\mathrm{p} \pi-\mathrm{d} \pi\) bond

\(\mathrm{SO}_{2}=6+6(2)=18 \mathrm{e}-16 \mathrm{e}=2 \mathrm{e} \rightarrow 1\) lone pair

\(\rightarrow \mathrm{G} . \mathrm{S}=[\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{4}\)

2 Unpaired electron \(1^{\text {st }}\) E.S. \(=[\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{3} 3 \mathrm{d}^{1}\)

4 unpaired electron \(\mathrm{O} \rightarrow 1 \mathrm{s}^{2} 2 \mathrm{s}^{2} 2 \mathrm{p}^{4}\)

\(\rightarrow\) Geometry of \(\mathrm{SO}_{2}\) is BENT/ANGULAR

\(\rightarrow\) one \(\mathrm{p} \pi-\mathrm{p} \pi\) and one \(\mathrm{p} \pi-\mathrm{d} \pi\) Bond

\(\rightarrow 2 \pi\) Bonds

\(\rightarrow 1\) lone pair on the central atom.