This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
Severe malnutrition is defined in adults with BMI less than 
Select and explain. 
A. 18.5, B. 16, C. 13, D. 11
B: 16
Answer: B: 16 
Explanation: Body mass index (BMI) BMI = wt (kg)/ ht (m)2 Example: an adult of 70 kg with a height of 1.75 m has a BMI of 70/1.752= 22.9 kg/m2 * BMI is a useful way of identifying under- or over-nutrition but cannot discriminate between lean body or muscle mass and fat mass <img src=" /> Ref Harrison 20th edition pg 76