Among the given oxides, only three oxides namely B2O3,SiO2 and CO3 are acidic oxides. ‌B2O3+2NaOH→NaBO3+H2O ‌SiO2+2NaOH→Na2SiO3+H2O ‌CO2+2NaOH→Na2CO3+H2O while Tl2O3 is basic oxide. CO is neutral oxide and Al2O3 and PbO2 are amphoteric oxides.