This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
[{'content': 'Flag sign is seen in ___________ \nSelect and explain. \nA. Marasmus, B. Kwashiorkor, C. Vitamin A deficiency, D. Rickets', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In kwashiorkor, the hair is straight and hypopigmented. The length of hair that grows during the period of nutritional deprivation appears reddish brown. During the phases of better nutrition, the growing pa of hair gets appropriately pigmented. This gives the appearance of alternate bands of hypopigmented and normally pigmented hair known as flag sign. Ref: Page 105; Ghai essential pediatrics; 6th edition', 'role': 'assistant'}]