# Which of the following group shows pseudo inert gas configuration

$\begin{array}{1 1}(a)\;III\;B&(b)\;I\;B\\(c)\;III\;A&(d)\;I\;A\end{array}$

$I\;B$ and $II\;B$ groups wexhibits pseudo-inert gas configuration.
$I\;B-II\;B$
Cu-Zn
Ag-Cd
Au-Hg
Hence (b) is the correct answer.