The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Endocarditis is most commonly seen in:   (A) Aortic stenosis.   (B) Mitral regurgitation.   (C) Patent ductus arteriosus.   (D) Venous bypass graft.
['(A) Aortic stenosis. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Aortic stenosis. \n (B) Mitral regurgitation. \n (C) Patent ductus arteriosus. \n (D) Venous bypass graft. <> possible answers', '  Endocarditis is most commonly seen in: <> context@']