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: Anaesthesia
Aspirin is stopped how many days prior to surgery 
Select and explain. 
A. 7 days, B. 14 days, C. 24 hours, D. None
D: None
Answer: D: None 
Explanation: Aspirin is not stopped.