Which vitamin plays a crucial role in the synthesis of neurotransmitters such as serotonin and dopamine?

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

Explanation

Vitamin B6 is a co-factor for the enzyme that converts tryptophan to serotonin and also for the conversion of tyrosine to dopamine.

Source

Guyton and Hall Textbook of Medical Physiology
Vitamins Biochemistry Neurotransmitter Synthesis Medium MEDICAL Confidence: high