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: Medicine
All are true about bilateral diaphragmatic paralysis,Except- 
Select and explain. 
A. Sniff test is positive, B. Causes normocapnic failure, C. Diaphragmatic pacing is useful if any nerve is intact, D. None of the above
B: Causes normocapnic failure
Answer: B: Causes normocapnic failure 
Explanation: None