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
Antibiotic prophylaxis is a must in: 
Select and explain. 
A. Angina pectoris, B. Infective endocarditis, C. Pulmonary embolism, D. Before all minor surgeries
B: Infective endocarditis
Answer: B: Infective endocarditis 
Explanation: None