Consider the oxides of group $14$ elements $SiO_2$,$GeO_2$,$SnO_2$,$PbO_2$,$CO$ and $GeO$. The amphoteric oxides are
- A$GeO, GeO_2$
- B$SiO_2, GeO_2$
- C$SnO_2, PbO_2$
- D$SnO_2, CO$
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