<prompt> Twelve years after menopause, a 60-year-old woman undergoes laparotomy for an ovarian carcinoma. The ovarian tumor that is most likely to respond to radiotherapy is which of the following?DysgerminomaKrukenbergs tumorArrhenoblastomasGranulosa cell tumor  <response>: Dysgerminoma like seminoma in men is very radiosensitive. The Krukenbergs tumor is a metastatic tumor to the ovary and is not treated by radiation. The other tumors are best treated by surgery. The Brenner tumor is most often a benign tumor. Arrhenoblastomas and granuloso cell tumors are hormone-producing tumors. 