Final answer:
Cracks around the corners of the mouth are characteristic of a vitamin B6 deficiency.
Step-by-step explanation:
The cracks around the corners of the mouth are characteristic of a vitamin B6 deficiency.
Vitamin B6, also known as pyridoxine, is a water-soluble vitamin that plays a crucial role in maintaining the health of the skin, nerves, and red blood cells. It is involved in the production of collagen, a protein that helps to maintain the integrity of the skin and mucous membranes.
Deficiency of vitamin B6 can lead to a condition called angular cheilitis, which is characterized by dry, cracked, and inflamed skin around the corners of the mouth.