The correct order of magnitude of bond angles among the compounds ${\mathrm{CH}}_4,{\mathrm{NH}}_3$ and ${\mathrm{H}}_2\mathrm{O}$ is

${\mathrm{H}}_2\mathrm{O}<{\mathrm{NH}}_3<{\mathrm{CH}}_4$

Bond angles depend upon number of lone pair (s) of electrons. Higher the number of lone pairs of electrons, lesser the bond angle.