Which vitamin acts as a coenzyme for the enzyme methionine synthase, which is involved in the conversion of homocysteine to methionine?

A Vitamin B6
B Vitamin B9
C Vitamin B12 ✓
D Vitamin B7

Explanation

Vitamin B12, also known as cobalamin, plays a critical role in the synthesis of methionine from homocysteine, a process that is essential for maintaining healthy levels of homocysteine in the blood.

Source

Harper's Biochemistry
Vitamins Biochemistry One-Carbon Metabolism Medium MEDICAL Confidence: high