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: Anaesthesia
Which of the following does not represent a significant anaesthetic problem in the morbidly obese patient ? 
Select and explain. 
A. Difficulties in endotracheal intubation, B. Suboptimal arterial oxygen tension, C. Increased metabolism of volatile agents, D. Decreased cardiac output relative to total body mass
D: Decreased cardiac output relative to total body mass
Answer: D: Decreased cardiac output relative to total body mass 
Explanation: Cardiac output is increased (not decreased) in morbid obesity. There is difficult intubation, hypoxemia and rapid metabolism of volatile anesthetics.