Which vitamin is involved in the metabolism of homocysteine and its deficiency is associated with an increased risk of cardiovascular disease?

A Vitamin B6
B Vitamin B9 (Folic acid)
C Vitamin B12
D All of the above
Vitamins B6, B9, and B12 are all involved in the metabolism of homocysteine, and deficiencies in these vitamins can increase the risk of cardiovascular disease.
Biochemistry textbooks
Vitamins Biochemistry Homocysteine metabolism Hard MEDICAL Confidence: high