A smooth red tongue with a slick appearance may indicate A)a niacin or vitamin B₁₂ deficiency. B)oral cancer. C)recent use of antibiotics. D)a fungal infection. E)a geographic tongue.

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A smooth red tongue with a slick appearance may indicate a niacin or vitamin B₁₂ deficiency. Oral cancer involves lesions; recent use of antibiotics can turn the tongue yellow-brown to black and hairy; and fungal infections result in slightly raised white, cream-colored, or yellow spots in the mouth. A geographic tongue has irregular areas of whitish and red areas.

A Smooth Red Tongue with a Slick Appearance May Indicate