MCQ
Which of the following is electron rich compound?
- A$BF _3$
- B$CH _4$
- C$BeCl _2$
- ✓$NH _3$
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Statement $(I)$ : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature.
Statement $(II)$ : Allotropic forms of carbon are due to property of catenation and $\mathrm{p} \pi-\mathrm{d} \pi$ bond formation.
In the light of the above statements, choose the most appropriate answer from the options given below:

(Atomic mass, $Ag =108, Br =80\, g\, mol ^{-1}$ )