The correct order of bond angles (smallest first) in $H_2S, NH_3, BF_3$ and $SiH_4$ is

Given below are two statements.
Statement $I$ : Stannane $(SnH_4)$ is an example of a molecular hydride.
Statement $II$ : Stannane is a planar molecule.
In the light of the above statements,choose the most appropriate answer from the options given below.

Among the compounds shown below,which one reveals a linear structure?

Which of the following possess two lone pairs of electrons on the central atom and are square planar in shape?
$I. SF_4, II. XeO_4, III. XeF_4, IV. ICl_4^-$

Identify the pair in which the geometry of the species is $T$-shape and square pyramidal,respectively.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$ :
Assertion $A$ : The $H-O-H$ bond angle in water molecule is $104.5^{\circ}$.
Reason $R$ : The lone pair $-$ lone pair repulsion of electrons is higher than the bond pair $-$ bond pair repulsion.