A 54-yrs-old woman undergoes a laparotomy because of a pelvic mass. At exploratory laparotomy, a unilateral ovarian neoplasm is discovered that is accompanied by a large omental metastasis. Frozen section diagnosis confirms metastatic serous cystadenocarcinoma. The most appropriate intraoperative course of action is:-
Excision of the omental metastasis and ovarian cystectomy Omentectomy and ovarian cystectomy Excision of the omental metastasis and unilateral oophorectomy Omentectomy, total abdominal hysterectomy, and bilateral salpingo oophorectomy