This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
The most common cause of painful pericarditis is 
Select and explain. 
A. Viral, B. Tuberculous, C. Uraemic, D. All of these
A: Viral
Answer: A: Viral 
Explanation: The cause of pericarditis is believed to be most often due to a viral infection. Other causes include bacterial infections such as tuberculosis, uremic pericarditis, following a hea attack, cancer, autoimmune disorders, and chest trauma Ref: guyton and hall textbook of medical physiology 12 edition