3. Which one of the following is also known as the tartaric acid? September 17, 2025 by Admin A. 2 3-dihydroxy butane 1 4 -dioic acid B. 2 3 -dihydroxy butanedioic acid C. 2 3 -dihydroxy butanedioic acid D. 2 2 -dihydroxy butanoic acid ✅ The correct answer is option A.