The correct order of bond angles of the following compounds is

As we move down to the group, the size of the central metal ion will increase and due to this the bond pair-bond pair repulsion will go on decreasing and therefore the two small hydrogen come closer to each other and so it causes decrease in $\mathrm{H}-\mathrm{M}-\mathrm{H}$ bond angle and hence the bond angle will decrease down to the group as shown below : 

${\mathrm{H}}_2\mathrm{O}>{\mathrm{H}}_2\mathrm{S}>{\mathrm{H}}_2\mathrm{Se}>{\mathrm{H}}_2\mathrm{Te}$