Which of the following pair is characterised by swollen lips, thick pigmented skin of hands and legs and irritability ?
(a) Thiamine ---- Beri-Beri
(b) Protein ---- Kwashiorkor
(c) Nicotinamide ---- Pellagra
(d) Iodine ---- Goitre
(c) Pellagra is characterised by swollen lips, pigmented skin of hands, legs and irritability. This disease is caused by the deficiency of vitamin-B3 or niacin. This is pellagra protective vitamin and can be synthesised in the body from amino acid tryptophan.