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': 'Body mass index (BMI) is a ratio of body weight to ? \nSelect and explain. \nA. Height, B. Square root of height, C. Square of height, D. Cube of height', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Square of height Body mass index Body mass index (BMI) is a simple index of weight for height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as the weight in kilograms divided by the squire of height in metres.", 'role': 'assistant'}]