Which of the following statements regarding bond angles in the given molecules is correct?

Bond angle in ${\mathrm{NF}}_3$ is smaller than in ${\mathrm{NH}}_3$ Also bond angle in ${\mathrm{OF}}_2$ is smaller than in ${\mathrm{OH}}_2$ .This is primarily due to ionicity of  $\mathrm{N}-\mathrm{F}$ and $\mathrm{O}-\mathrm{F}$ bonds. The more electronegative fluorine atoms attract bonding electorn pairs away from N and O nuclei. This causes expansion of lone pair causing bond angles $\mathrm{F}-\mathrm{N}-\mathrm{F}$ and $\mathrm{F}-\mathrm{O}-\mathrm{F}$ smaller than those in $\mathrm{H}-\mathrm{N}-\mathrm{H}$ and 

$\mathrm{H}-\mathrm{O}-\mathrm{H}$ Experimental values are: ${\mathrm{NF}}_3\left({102.3}^{\circ }\right),{\mathrm{NH}}_3\left({107.2}^{\circ }\right),{\mathrm{OF}}_2$$\left({103.1}^{\circ }\right)$ and ${\mathrm{OH}}_2\left({104.5}^{\circ }\right)$.