The correct option is D All of the above
Neutral oxides are those which do not form acids or bases when they react with H2O. In other words, the resulting solution is neutral.
1. CO+H2O⟶CO2+H2
2. Nitrous oxide (N2O) and nitric oxide (NO) are neutral gaseous oxides of nitrogen. These two nitrogen oxides do not react with water to form oxoacids such as HNO2 and HNO3.