Which of the following acids is a vitamin?

1.  Aspartic and

2.  Ascorbic acid

3.  Adipic acid

4.  Saccharic acid

Hint: Vitamin C

Ascorbic acid is the chemical name of vitamin C. While others are not vitamins aspartic acid is an amino acid. Adipic acid is a dicarboxylic acid having 8 carbon chain. Saccharic acid is a dicarboxylic acid obtained by oxidation of glucose using HNO3.