We'll analyze each oxide based on its chemical behavior regarding acid-base properties: C2O3 Compounds of carbon with oxygen are generally acidic. In this case, although C2O3 is not commonly encountered, nonmetal oxides tend to be acidic rather than basic. CrO3 This is a well-known oxide of chromium in a high oxidation state. It is acidic in nature (in fact, it reacts with water to eventually form chromic acid). V2O5 Vanadium(V) oxide is also in a high oxidation state. Like many high oxidation state transition metal oxides, it behaves as an acidic oxide (or sometimes amphoteric but predominantly leaning towards acidic behavior). V2O3 Vanadium(III) oxide, with vanadium in a lower oxidation state, tends to be a basic oxide. In transition metals, as the oxidation state decreases, the oxide becomes more basic because the metal acts more like a typical metal ion. Thus, the basic oxide among the options is: V2O3 In summary: Nonmetal oxides like C2O3 are acidic. High oxidation state metal oxides such as CrO3 and V2O5 are acidic. The lower oxidation state metal oxide, V2O3, exhibits basic properties. So, the correct answer is Option D : V2O3.