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
Feature of Acute severe Asthma include all of the following, Except: 
Select and explain. 
A. Tachycardia > 120/min, B. Pulsus paradoxus, C. Respiratory acidosis, D. None
D: None
Answer: D: None 
Explanation: Answer is D (None: All are Features of Acute severe Asthma) : Tachycardia (HR>120/min). PEFR < 50%, Pulsus paradoxus and Respiratory Acidosis are all features of Acute severe Asthma.