This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malnutrition, Subject name: Pediatrics
What is the abnormality shown in the hairs of a child with severe malnutrition? 
Select and explain. 
A. Light dark sign, B. Flag sign, C. Hair sign, D. Colour sign
B: Flag sign
Answer: B: Flag sign 
Explanation: Alternate bands of pigmented & hypopigmented hairs seen in a child with malnutrition - 'Flag sign'.