Which one of the following pairs is not correctly matched?
(a) Vitamin B12 - Pernicious anaemia
(b) Vitamin-B1 - Beri-beri
(c) Vitamin-C - Scurvy
(d) Vitamin B2 - Pellagra
(d) Pellagra (Italian Pelle = skin, agra = rough) is a skin disease which is caused by the deficiency of vitamin-B3 or niacin. Pellagra is especially frequent among the people eating food with low tryptophan (an essential amino acid).