Read the pairs given below-1. Aceton: [CH]2OHCHOH[CH]2OH2. Ethanal : [CH]3CHO3. Formaldehyd: HCHO4. Glycerol: [CH]3CO[CH]3Which of the above pairs are correctly matched?

• A. 2 and 3 only
• B. 1 and 4 only
• C. 2, 3 and 4 only
• D. 1, 2, 3 and 4 only