## **Core Concept**
The question tests knowledge on the clinical signs associated with ovarian tumors, specifically those indicating inoperability. Ovarian tumors can present with various symptoms and signs, and determining their resectability is crucial for management planning.

## **Why the Correct Answer is Right**
The correct answer, **.**, likely refers to a specific sign that indicates an ovarian tumor is not operable. One key sign of inoperability is the presence of **ascites** with a **high albumin-to-globulin ratio** or more specifically, **a palpable abdominal mass extending beyond the pelvis with significant ascites**. However, a more definitive sign of inoperability is **fixed, immobile, or deeply embedded tumor**, but among the provided options, one stands out for indicating a poor prognosis or advanced disease.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Without the specific details of what A represents, it's hard to directly refute, but generally, signs like a mass limited to the pelvis might not necessarily indicate inoperability.
- **Option B:** Similarly, without specifics, one can't directly address why B is incorrect, but if B suggests an early-stage or localized disease, it wouldn't indicate inoperability.
- **Option C:** This option might represent another clinical feature; if it suggests an early or resectable tumor, it wouldn't be a sign of inoperability.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that **the presence of significant ascites, especially if it's a large volume or if there's evidence of metastasis (e.g., omental caking), often signifies advanced disease and potentially inoperable status**. Clinicians use imaging and clinical assessment to evaluate the extent of disease.

## **Correct Answer: D.**