Final answer:
CA-125 option (A) is the lab test used to monitor treatment and recurrence in patients treated for epithelial cell ovarian cancer. It is a protein biomarker specific to ovarian cancer, and tracking its level post-treatment can be indicative of the cancer's status.
Step-by-step explanation:
The appropriate lab test to monitor treatment and recurrence in a patient who was treated for epithelial cell ovarian cancer with TAH+BSO (Total Abdominal Hysterectomy + Bilateral Salpingo-Oophorectomy) is A) CA-125. CA-125 is a protein biomarker that is used specifically in the detection of ovarian cancer. The levels of CA-125 in the blood can be elevated in the presence of ovarian cancer, and monitoring these levels can provide important information regarding the effectiveness of the treatment and can indicate whether the cancer has recurred after treatment. Other markers such as PSA, AFP, and hCG are not specific to ovarian cancer and are associated with prostate, liver/testicular, and pregnancy-related or trophoblastic tumors, respectively.