This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Normal body mass index is- \nSelect and explain. \nA. 18.5 to 24.99, B. 15 to 18, C. 25.00 to 29.99, D. Greater than 30', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Commonly accepted BMI ranges are underweight: under 18.5 kg/m2, normal weight: 18.5 to 25, overweight: 25 to 30, obese: over 30. Ref Davidson 23rd edition pg 699', 'role': 'assistant'}]