Compound having planar symmetry is

In the following three-dimensional structure of $CH_4$,the bonds are labelled as $W, X, Y$ and $Z$. The bonds projecting out of the plane are:

Based on $VSEPR$ theory,the number of $90^{\circ}$ $F-Br-F$ bond angles in $BrF_5$ is

Given below are two statements:
Statement $(I) :$ For $ClF_3$,all three possible structures may be drawn as follows:
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Statement $(II) :$ Structure $III$ is most stable,as the orbitals having the lone pairs are axial,where the $\ell p-bp$ repulsion is minimum.
In the light of the above statements,choose the most appropriate answer from the options given below:

The correct structure of $PCl_3F_2$ is

$SF_6$ is a kinetically inert substance because