Casal's Necklace is seen in deficiency of: (A) Vitamin A, (B) Vitamin B3, (C) Vitamin B6, (D) Vitamin D
Answer is B. Pellagra Pellagra occurs due to Vitamin B3 (Niacin) deficiency Pellagra is characterized by by 4D's : 1.Diarrhoea 2.Dermatitis 3.Dementia 4.Death. Skin rash in Pellagra may appear as pigmented and scaly in areas exposed to sunlight. Especially neck when it is known as 'Casal's Necklace' Ref: Park 25th edition Pgno : 657 Harrison's 15th edition Pgno : 463