Given below are two statements : One is labelled as Assertion $\mathrm{A}$ and the other is labelled as Reason $\mathrm{R}$

Assertion $\mathrm{A}$ : Zero orbital overlap is an out of phase overlap.

Reason $\mathrm{R}$ : It results due to different orientation/ direction of approach of orbitals.

In the light of the above statements. Choose the correct answer from the options given below

Consider, ${\mathrm{PF}}_5,{\mathrm{BrF}}_5,{\mathrm{PCl}}_3,{\mathrm{SF}}_6,{\left[{\mathrm{ICl}}_4\right]}^{-},{\mathrm{ClF}}_3$ and ${\mathrm{IF}}_5$

Amongst the above molecule(s) ion(s), the number of molecule(s)/ion(s) having ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybridisation is

Order of Covalent bond;

A. $\mathrm{KF}>\mathrm{KI}; \mathrm{LiF}>\mathrm{KF}$

B. $\mathrm{KF}<\mathrm{KI}; \mathrm{LiF}>\mathrm{KF}$

C. ${\mathrm{SnCl}}_4>{\mathrm{SnCl}}_2; \mathrm{CuCl}>\mathrm{NaCl}$

D. $\mathrm{LiF}>\mathrm{KF}; \mathrm{CuCl}>\mathrm{NaCl}$

E. $\mathrm{KF}<\mathrm{KI}; \mathrm{CuCl}>\mathrm{NaCl}$

$\mathrm{O}-\mathrm{O}$ bond length in ${\mathrm{H}}_2{\mathrm{O}}_2$ is $\underset{¯}{\mathrm{X}}$ than the $\mathrm{O}-\mathrm{O}$ bond length in ${\mathrm{F}}_2{\mathrm{O}}_2$. The $\mathrm{O}-\mathrm{H}$ bond length in ${\mathrm{H}}_2{\mathrm{O}}_2$ is $\underset{¯}{Y}$ than that of the $\mathrm{O}-\mathrm{F}$ bond in ${\mathrm{F}}_2{\mathrm{O}}_2$. Choose the correct option for $\underset{¯}{\mathrm{X}}$ and $\underset{¯}{\mathrm{Y}}$ from the given below.