b
ઓલિયમ \(H_2S_2O_7\) : \(\begin{array}{*{20}{c}}
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}\\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{OH - S - O - S - OH}\\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||}\\
{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}
\end{array}\)