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
all of the following are absolute contraindications for tooth extraction except: 
Select and explain. 
A. Central hemangioma, B. Fistulas, C. Unstable angina pectoris, D. A v malformation
C: Unstable angina pectoris
Answer: C: Unstable angina pectoris 
Explanation: None