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
A patient with multiple loose teeth requires extraction and has mitral stenosis with mild cardiac insufficiency. He is on enalapril, digoxin, and furosemide. The antibiotic of choice to prevent bacterial endocarditis is: 
Select and explain. 
A. Amoxicillin, B. Doxycycline, C. Cotrimoxazole, D. Gentamicin
A: Amoxicillin
Answer: A: Amoxicillin 
Explanation: None