d
A super octet molecule is the one which has more than 8 electrons in an ultimate shell around central metal atom.

A) In ClF \(_{3}\), Cl: \([\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{5} ;\) Cl has 10 electrons in ultimate shell and \(7 \mathrm{e}^{-}\) in valence shell.

B) In \(\mathrm{P} \mathrm{Cl}_{5}, \mathrm{P}:[\mathrm{Ne}] 3 \mathrm{s}^{2} 3 \mathrm{p}^{3} ; \mathrm{P}\) has 10 electrons in ultimate shell and \(5 \mathrm{e}^{-}\) in valence shell.

C) In \(\mathrm{IF}_{7}, \mathrm{I}:[\mathrm{Kr}] 5 \mathrm{s}^{2} 4 \mathrm{d}^{10} 5 \mathrm{p}^{5} ; \mathrm{I}\) has 14 electrons in ultimate shell and \(7 \mathrm{e}^{-}\) in valence shell.