This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
Me Callum patch is seen:(1991) 
Select and explain. 
A. Rheumatoid arthritis, B. SLE, C. Rheumatic fever, D. Polyarthritis nodosa
C: Rheumatic fever
Answer: C: Rheumatic fever 
Explanation: Ans: c (Rheumatic fever)Ref: Robbin's, 7th ed, p. 594 & 6th ed, p. 572