The structure of ammonia $(NH_3)$ is.......

Which of the following molecules has the lowest bond angle?

Given below are two statements:
Statement $I$: The number of compounds among $SO_2$, $SO_3$, $SF_4$, $SF_6$ and $H_2S$ in which sulphur does not obey the Octet rule is $3$.
Statement $II$: Among $[H_2O, ClF_3, SF_4]$, $[NH_3, BrF_5, SF_4]$, $[BrF_5, ClF_3, XeF_4]$ and $[XeF_4, ClF_3, H_2O]$, the number of sets in which all the molecules have one lone pair of electrons on the central atom is $1$.

Which set of species is arranged in order of increasing $O-N-O$ bond angle?

The bond angle in ammonia molecule is

$XeF_2, NO_2, HCN, ClO_2, CO_2$. Identify the non-linear molecule pair from the above-mentioned molecules.