This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Anatomy
All are causes of myocarditis except 
Select and explain. 
A. Trichiasis, B. Mycobacterium tuberculosis, C. Corynebacterium diptheriae, D. SLE
B: Mycobacterium tuberculosis
Answer: B: Mycobacterium tuberculosis 
Explanation: Refer robbins 9/e 571 Mycobacterium tuberculosis causes involvement of pericardium (caseous pericarditis). It is common cause of chronic constrictive pericarditis Primary pericarditis is unusual and is often viral in origin