Which of the following is amphoteric oxide?
Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4
(i) V2O5, Cr2O3
(ii) Mn2O7, CrO3
(iii) CrO, V2O5
(iv) V2O5, V2O4
Option (i) V2O5, Cr2O3 is the answer
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