A) thiamine
B) niacin
C) pyridoxin
D) biotin
Correct Answer: B
Solution :
Pellagra is caused due to deficiency of niacin (nicotinic acid or nicotinamide). Thiamine (vitamin- \[{{B}_{1}}\]) deficiency causes beri- beri in humans and polyneuritis in animals, pyridoxine (vitamin-Be) deficiency causes anaemia, neuritic pain, convulsions, skin lesions, while biotic (vitamin- \[{{B}_{6}}\]) deficiency causes dermatitis.
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