Deficiency of which of the following vitamins can lead to cracks in the corners (commissures)of the mouth?

Question

Quizplus · Accepted Answer

Vitamin B₂ is important for releasing energy from proteins and fats,and deficiency can lead to cracks in the corners of the mouth.
Deficiency of vitamin A leads to dry,flaky skin,and night blindness.
Vitamin C is important for maintenance of blood vessels and capillaries; lack of this vitamin leads to swollen and inflamed gum tissue.
Deficiency of vitamin D leads to poorly formed bones and teeth.

Deficiency of Which of the Following Vitamins Can Lead to Cracks