<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 57-year-old female presents to general gynecology clinic for evaluation of a pelvic mass. The mass was detected on a routine visit to her primary care doctor during abdominal palpation. In the office, she receives a transvaginal ultrasound, which reveals a mass measuring 11 cm in diameter. In the evaluation of this mass, elevation of which tumor marker would be suggestive of an ovarian cancer?? A: S-100, B: CA-125, C: Beta-hCG, D: Alpha fetoprotein, E: CA-19-9,  <response>: This is a question about evaluating a pelvic mass in a 57-year-old female patient. Based on the information provided, this mass is likely ovarian in origin. The question asks which tumor marker would be elevated in ovarian cancer. S-100 is associated with melanoma. Beta-hCG is elevated in pregnancy and gestational trophoblastic tumors. Alpha fetoprotein is associated with germ cell tumors and hepatocellular carcinoma. CA-19-9 can be elevated in pancreatic, gastrointestinal and ovarian cancers. CA-125 is the tumor marker that is most suggestive of ovarian cancer when elevated.B: CA-125 