This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
The BODE index, a simple multidimensional grading system, is better than the FEV1 at predicting the risk of death from any cause and from respiratory causes among patients with COPD. Which of the following is not the component of BODE index? 
Select and explain. 
A. BMI, B. Oxygen requirement, C. Dyspnoea, D. Exercise performance
B: Oxygen requirement
Answer: B: Oxygen requirement 
Explanation: BODE index includesBMIAirflow ObstructionDyspnoeaExercise performance