The correct pair of species which are not isostructural is

Which of the following molecules has trigonal planar geometry?

The correct order of bond angle is:

The bond angle in $A$ is $X$ and the bond angle in $B$ is $Y$. What are $X$ and $Y$?

$A$	$B$
$CH_3OH$	$CH_3OCH_3$

The number of species from the following carrying a single lone pair on the central atom Xenon is $.....$: $XeF_5^{+}, XeO_3, XeO_2F_2, XeF_5^{-}, XeO_3F_2, XeOF_4, XeF_4$

The number of lone pairs of electrons on the central atoms of $H_{2}O, SnCl_{2}, PCl_{3}$ and $XeF_{2}$ respectively,are