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
Fever, clubbing and Osler's nodes occur in: 
Select and explain. 
A. Typhoid fever, B. Rheumatic fever, C. Infective endocarditis, D. Leptospirosis
C: Infective endocarditis
Answer: C: Infective endocarditis 
Explanation: None