The key to answering this question is understanding that a molecule is paramagnetic when it has one or more unpaired electrons. Let's examine each option briefly: SO2 (Sulfur dioxide): In this molecule, all electrons are paired, making it diamagnetic. NO2 (Nitrogen dioxide): This molecule has an odd number of electrons, which results in an unpaired electron. Hence, it is paramagnetic. SiO2 (Silicon dioxide): This compound has all electrons paired, so it is diamagnetic. CO2 (Carbon dioxide): This molecule also has all electrons paired, rendering it diamagnetic. Thus, the paramagnetic oxide among the given options is: Option B: NO2