## Core Concept
The question revolves around the management of a patient with ovarian cancer, specifically focusing on the surgical staging and treatment approach based on the intraoperative findings. Ovarian cancer is a common gynecological malignancy, and its staging and treatment depend on the extent of disease spread. The **International Federation of Gynecology and Obstetrics (FIGO)** staging system is used for ovarian cancer.

## Why the Correct Answer is Right
Given that the patient has bilateral ovarian masses with surface involvement and ascites but no pelvic or extrapelvic extension of the tumor or lymph node involvement, the cancer is likely at an early stage (possibly Stage IC due to the presence of ascites and surface involvement). For early-stage ovarian cancer, comprehensive surgical staging is crucial. This typically involves **bilateral salpingo-oophorectomy**, **hysterectomy**, **peritoneal biopsies**, **ascites or peritoneal washings for cytology**, and possibly **pelvic and para-aortic lymph node dissection** if there's any suspicion of spread. The goal is to remove all visible tumor deposits.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is not provided, but generally, any option suggesting less than comprehensive staging or inappropriate surgery for the given extent of disease would be incorrect.
- **Option B:** Similarly, without specifics, any option suggesting chemotherapy alone or a less aggressive surgical approach than comprehensive staging would be inappropriate for potentially early-stage disease with no clear evidence of widespread metastasis.
- **Option D:** Without details, if an option suggests a more extensive surgery than necessary or omits critical components of surgical staging, it would be incorrect.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **CA-125** is a tumor marker commonly elevated in ovarian cancer but is nonspecific and can be elevated in various benign conditions. For ovarian cancer staging, **surgical exploration** remains the gold standard. The presence of **ascites** or positive cytology can upstage the disease (e.g., from Stage I to Stage IC), significantly impacting treatment planning.

## Correct Answer Line
**Correct Answer: C.**

✓ Correct Answer: C. Proceed with surgical staging with hysterectomy + Bilateral salpingo-oophorectomy followed by adjuvant chemotherapy