Following are the symptoms of niacin deficiency.
1. Diarrhoea
2. Dermatitis
3. Cretinism
4. Dementia
5. Koilonychia
A. 1, 2 and 3
B. 1, 2 and 4
C. 2, 3 and 4
D. 2, 3 and 5
Answer: Option B
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