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: Surgery
All of the following are signs of respiratory insufficiency except: 
Select and explain. 
A. Hypoxia, B. Inability to speak, C. Strider during inspiration, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans: D. All of the above(Ref Bailey 27/e p929-925, 26/e p303: Sobiston 20/e p557: Harrison 19/e p1661, 1731, 1732).Respiratory Insufficiency:Inability of lungs to function properly & maintain normal processes of oxygen uptake & carbon dioxide removal.Sign & symptoms of respiratory insufficiency:Fatigue, shoness of breath, heavy breathing, rapid breathing, exercise intolerance, hypoxia, inability to speak & stridor during inspiration.