Which of the following has the smallest bond angle?

The number of species having a non-pyramidal shape among the following is:
$A$. $SO_{3}$
$B$. $NO_{3}^{-}$
$C$. $PCl_{3}$
$D$. $CO_{3}^{2-}$

The species having a pyramidal shape is

Select from each set the molecule or ion having the smallest bond angle:
$(i)$ $NH_3, PH_3$ or $AsH_3$
$(ii)$ $O_3^+, O_3$
$(iii)$ $NO_2^-$ or $O_3$
$(iv)$ $X-S-X$ angle in $SOCl_2$ and $SOF_2$

Identify the correct statement regarding geometry and lone pair of electrons present in $CH_4$ and $SiCl_4$.

Shape of $(SiH_3)_3N$ and $(SiH_3)_3P$ respectively are