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# Which of the pair is linear in shape and with three lone pairs?

$\begin{array}{1 1}(a)\;CO_2, SO_2&(b)\; XeF_2, SCl_2\\(c)\; HgCl_2, BeF_2&(d). XeF_2, I_3^-\end{array}$

$XeF_2, I_3^-$
Hence (d) is the correct option.