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
Prophylactic antibiotic coverage before dental extraction is indicated for all the following except: 
Select and explain. 
A. Kidney damage on hemodialysis, B. Prosthetic aortic valve, C. Rheumatic heart disease, D. Coronary artery bypass
D: Coronary artery bypass
Answer: D: Coronary artery bypass 
Explanation: None