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
MacCullum plaques in acute rheumatic fever are usually seen in 
Select and explain. 
A. Right atrium, B. Left atrium, C. Right ventricle, D. Left ventricle
B: Left atrium
Answer: B: Left atrium 
Explanation: None