This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'In assessing the nutritional status of community the following are used except \nSelect and explain. \nA. Mortality in 1-4 years age group, B. Percentage of pregnant lady with less than 11.5% Hb, C. Weight/height index in preschool children, D. Low birth weight', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]