![Which out of the following amino acid is a precursor of niacin (Vitamin)?](https://www.gkseries.com/blog/wp-content/uploads/2022/01/Which-out-of-the-following-amino-acid-is-a-precursor-of-niacin-Vitamin.png)
Q. Which out of the following amino acid is a precursor of niacin (Vitamin)?
A. Tyrosine
B. Threonine
C. Tryptophan
D. Phenylalanine
Answer: Tryptophan
A. Tyrosine
B. Threonine
C. Tryptophan
D. Phenylalanine
Answer: Tryptophan
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