Order of number of planes present in molecule which contains maximum number of atoms of corresponding molecule :

Each methane molecule contains 5 atoms total: 1 carbon atom, 4 hydrogen atoms, and 1 oxygen atom.

The octahedral form of ${\mathrm{SF}}_6$will have five atoms in the horizontal plane (4F-atoms and 1S atom)

${\mathrm{IF}}_7$ contains seven Fluorine atoms and one Iodine atom.'

No. of such planes in $\begin{array}{r}{\mathrm{CH}}_4=10\end{array}$

 No. of such planes in $\begin{array}{r}{\mathrm{SF}}_6=3\end{array}$

 No. of such planes in $\begin{array}{r}{\mathrm{IF}}_7=1\end{array}$