The correct option is
A Aldehydes on reacting with strong oxidising agents like
KMnO4, HNO3, K2Cr2O7 will oxidise to carboxylic acids.
Popoff's rule states that during the oxidation of unsymmetrical ketone, the cleavage of the C─CO bond is done in such a way that the keto group is always with the smaller alkyl group.
Hence, here the C─CO breaks so that the keto group is with the methyl group and leads to formation of acetic acid.