## **Core Concept**
The question pertains to the identification of "Call-Exner bodies," which are a specific histopathological feature. Call-Exner bodies are small, eosinophilic fluid collections or spaces surrounded by a rosette of granulosa cells. They are characteristic of a particular type of ovarian tumor.

## **Why the Correct Answer is Right**
Call-Exner bodies are pathognomonic of **Granulosa Cell Tumors** of the ovary. These tumors are a type of sex cord-stromal tumor and are known for producing estrogen. The presence of Call-Exner bodies, which are actually small, cystic spaces filled with eosinophilic fluid and surrounded by a rosette of granulosa cells, is a diagnostic hallmark of this tumor type. This feature is crucial for the histological diagnosis of granulosa cell tumors.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond with the correct association of Call-Exner bodies.
- **Option B:** This option is incorrect as it does not accurately represent the association of Call-Exner bodies with a specific tumor type.
- **Option C:** Although not directly provided, any option not associated with granulosa cell tumors would be incorrect based on the specific link between Call-Exner bodies and granulosa cell tumors.
- **Option D:** Similarly, this option would be incorrect if it does not correctly identify granulosa cell tumors as the entity associated with Call-Exner bodies.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Call-Exner bodies are a diagnostic feature that helps differentiate granulosa cell tumors from other ovarian tumors. These tumors are known for their estrogen-producing capabilities, which can lead to symptoms like endometrial hyperplasia or cancer. Recognizing the histological features of ovarian tumors is crucial for appropriate management and prognosis.

## **Correct Answer:** C. Granulosa cell tumor.