<prompt> Which ovarian cyst does not undergo malignancy:MucinousPapillaryDermoidNone  <response>: Ans. is None Rate of malignant transformation of different tumors : Serous cystadenoma -- 25 Granulosa cell tumor -- 50 Mucinous cystadenoma -- 5 -10 Dermoid -- 1.7 Of these dermoid has the lowest incidence so you may mark it as a answer. 