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: Pediatrics
Least common valve involved in rheumatic fever? 
Select and explain. 
A. Aoic valve, B. Tricuspid valve, C. Mitral valve, D. Pulmonary valve
D: Pulmonary valve
Answer: D: Pulmonary valve 
Explanation: Ans. is 'd' i.e., Pulmonary valve Endocarditis in rneumatic fever Mitral valve involved almost all the cases of Acute Rheumatic Fever. Almost 25% of MR is asociated with aoic regargitation. Tricuspid regurgitation is seen in 10-30% cases. Pulmonary valve involvement is never seen.