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: Pharmacology
American society of anesthesiologists' physical status classification system, P2 is a is a patient who 
Select and explain. 
A. Is healthy, B. With mild systemic disease, C. With severe systemic disease, D. None of the above
B: With mild systemic disease
Answer: B: With mild systemic disease 
Explanation: None