<prompt> A young female patient came for routine examination. On examination a mid systolic click was found. There is no history of RHD. The histopathological examination is most likely to showMyxomatous degeneration and prolapse of the mitral valveFibrinous deposition on the tip of papillary muscleRupture of chordae tendinaeAschoff nodule on the mitral valve  <response>: Ans. a. Myxomatous degeneration and prolapse of the mitral valve 