This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is the be st indicator of long term nutritional status - \nSelect and explain. \nA. Mid arm circumference, B. Height for age, C. Weight for age, D. Weight for height', 'role': 'user'}, {'content': "Answer: B \nExplanation: Height indicate events in the past. So it is the best measure for nutritional status. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 501", 'role': 'assistant'}]