Periodic Table and Periodicity

We'll analyze each oxide based on its chemical behavior regarding acid-base properties:$\mathrm{C_2O_3}$Compounds of carbon with oxygen are generally acidic. In this case, although $\mathrm{C_2O_3}$ is not commonly encountered, nonmetal oxides tend to be acidic rather than basic.$\mathrm{CrO_3}$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).$\mathrm{V_2O_5}$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).$\mathrm{V_2O_3}$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:$\mathrm{V_2O_3}$In summary:Nonmetal oxides like $\mathrm{C_2O_3}$ are acidic.High oxidation state metal oxides such as $\mathrm{CrO_3}$ and $\mathrm{V_2O_5}$ are acidic.The lower oxidation state metal oxide, $\mathrm{V_2O_3}$, exhibits basic properties.So, the correct answer is Option D : $\mathrm{V_2O_3}$.