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
Undue restlessness in a patient during the immediate post burn period is often a manifestitation of - 
Select and explain. 
A. Hypoxia, B. Hypovolemia, C. Hyperkalemia, D. Anxiety
D: Anxiety
Answer: D: Anxiety 
Explanation: None