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: Pathology
[{'content': 'A young female patient came for routine examination.On examination a mid systolic click was found. There is no history of RHD. The histopathologicaI examination is most likely to show \nSelect and explain. \nA. Myxomatous degeneration and prolapsed of the mitral valve, B. Fibrinous deposition on the tip of papillary muscle, C. Rupture of chordae tendinae, D. Asehoff nodule on the mitral valve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Myxomatous mitral valve most paintents are asymptomatic and the valvular abnormality is discovered only incidently on physical examination. In minority of cases patient complains of palpitation, dyspnea, or atypical chest pain. Auscultation discloses a mid systolic click caused by abrupt tensn on the redundant valve leaflets and chordae tendineae as the valve attempt to close Robbins 9 th edition page no. 390', 'role': 'assistant'}]