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
Which of the heart valve is most likely to be involved by Infective endocarditis following a septic abortion: 
Select and explain. 
A. Aortic valve., B. Tricuspid valve., C. Pulmonary valve., D. Mitral valve.
B: Tricuspid valve.
Answer: B: Tricuspid valve. 
Explanation: None