The correct options are
A CO
C N2O
Neutral oxides are those oxides which show neither basic nor acidic properties when they react with water. Examples include carbon monoxide (CO) and nitrous oxide (N2O) which are only slightly soluble in water, and nitric oxide (NO) which is appreciably soluble in cold water.So ZnO and SnO2 are not neutral oxides. Hence option A & C are correct.