This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Subject name: Pediatrics
[{'content': "Rao and Singh's index is? \nSelect and explain. \nA. Age-dependent index, B. Age-independent index, C. Age and sex-dependent index, D. Independent of wt and ht", 'role': 'user'}, {'content': "Answer: B \nExplanation: RAO & SINGH'S INDEX: - It is calculated as Weight (in kg) x 100/height2 (in cm) - Normal value: 0.14 - In children with malnutrition: 0.12 - 0.14", 'role': 'assistant'}]