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: Physiology
[{'content': 'BMI of underweight individual: March 2008 \nSelect and explain. \nA. Less than 18.5, B. 18.5-24.9, C. 25-29.9, D. More than 30', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Less than 18.5BMI=Weight/ HeightLess than 18.5- underweight18.5-24.9- Normal25-29.9- OverweightMore than 30- Obese', 'role': 'assistant'}]