The correct option is A Vitamin B6 -Loss of appetite
Vitamin B6 helps the body make several neurotransmitters, chemicals that carry signals from one nerve cell to another. It is needed for normal brain development and function and helps the body make the hormones serotonin and norepinephrine, which influence mood, and melatonin, which helps regulate the body clock. And so vitamin B6 deficiency can over time cause symptoms which include changes in moods, such as irritability, anxiety, and depression, confusion, muscle pains, low energy, or fatigue. It is also associated with anemia, dermatitis etc.