Answer
Increasing order of oxidation state is A then B Compound. The carbon of carboxyl group has higher oxidation state than the alcohol carbon. As oxidation state describes the degree of loss of electrons of an atom. The maximum oxidation state a carbon can attain when Carbon atom gains bond to more electronegative elements that is oxygen.
Work Step by Step
Increasing order of oxidation state is A then B Compound. The carbon of carboxyl group has higher oxidation state than the alcohol carbon. As oxidation state describes the degree of loss of electrons of an atom. The maximum oxidation state a carbon can attain when Carbon atom gains bond to more electronegative elements that is oxygen.