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
Which is not a characteristic of paradoxical sleep- 
Select and explain. 
A. High heart rate, B. High B.P., C. High respiratory rate, D. Muscle hypertonia
D: Muscle hypertonia
Answer: D: Muscle hypertonia 
Explanation: None