Elements of group A. Bi2O5
Bismuth commonly shows +3 oxidation state instead of +5 oxidation state due to inert pair effect (recultance of s electrons to take part in bond formation)
But fluorine has small size and high electronegativity than oxygen, chlorine and sulphur.
Therefore bismuth forms BiF5 and show +5 oxidation state.
Hence the correct option (ii).
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