Discussion
Deficiency of essential fatty acids causes ..........................
Answer: C
Essential fatty acid deficiency causes phrynoderma.
Phrynoderma, or 'toad skin', is a follicular hyperkeratosis: rough, horny papules around the hair follicles, especially on the elbows, knees and thighs. It is classically attributed to a lack of essential fatty acids (linoleic acid) and is also seen in vitamin A deficiency.
The other conditions belong to B vitamins: beriberi to thiamine deficiency, pellagra to niacin deficiency with its dermatitis, diarrhoea and dementia, and cheilosis (cracking at the corners of the lips) to riboflavin deficiency.
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