Question

question 21
riboflavin is also known as ________.

vitamin b₁
vitamin b₂
vitamin b₁₂
vitamin b₉

Explanation:

Riboflavin is the chemical name for vitamin \( \text{B}_2 \). Vitamin \( \text{B}_1 \) is thiamine, vitamin \( \text{B}_{12} \) is cobalamin, and vitamin \( \text{B}_9 \) is folic acid, so the correct identification of riboflavin's common name is vitamin \( \text{B}_2 \).

Answer:

B. vitamin \( \text{B}_2 \)