This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
Most common manifestation of cardiac lupus is - 
Select and explain. 
A. Myocarditis, B. Libman-Sacks endocardits, C. Pericarditis, D. Aoic regurgitation
C: Pericarditis
Answer: C: Pericarditis 
Explanation: Cardiovascular Manifestations of SLE The most common manifestation is pericarditis. Myocarditis and Libman-Sacks endocarditis can also occur. The endocarditis is due to accumulation on the hea valves of sterile fibrin containing vegetations, which is thought to be a manifestation of hypercoagulability associated with antiphospholipid antibodies. The risk of atherosclerosis is greatly increased, as is the risk of stroke and myocardial infarction. REF - DAVIDSONS MEDICINE 23E P2517