Major causes of Mitral Valve Stenosis are ________.
a. Rheumatic fever, congenital malformations, infective endocarditis, myxomatous degeneration
b. Hypertension, atherosclerosis, calcification, aging
c. Rheumatoid arthritis, systemic lupus erythematosus, scleroderma, sarcoidosis
d. Coronary artery disease, myocardial infarction, cardiomyopathy, heart failure

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