Question

question 29
niacin is also known as vitamin ________.

○ ( \text{b}_3 )

○ ( \text{b}_1 )

○ ( \text{b}_{12} )

○ ( \text{b}_5 )

Explanation:

Niacin, also called nicotinic acid, is a water - soluble vitamin and is known as vitamin $\text{B}_3$. Vitamin $\text{B}_1$ is thiamine, vitamin $\text{B}_{12}$ is cobalamin, and vitamin $\text{B}_5$ is pantothenic acid, so they do not match the identity of niacin.

Answer:

A. $\text{B}_3$