Correct option is D
Option (a) is correctly matched. Pepsin is an enzyme that breaks down proteins in the stomach.
Option (b) is correctly matched. Biotin is a type of Vitamin B (Vitamin B7).
Option (c) is correctly matched. RNA (Ribonucleic Acid) is a polymer made up of nucleotides.
Option (d) is NOT correctly matched. Cholesterol is not a hormone; it is a type of lipid or fat. Hormones are chemical messengers, and examples include insulin, adrenaline, and estrogen.