**Core Concept**
Non-Hodgkin Lymphoma (NHL) is a diverse group of lymphoid malignancies characterized by the clonal expansion of lymphoid cells. Intermediate-grade NHLs are a subset of NHLs with a moderate to high proliferation rate, typically associated with a worse prognosis compared to low-grade NHLs.

**Why the Correct Answer is Right**
Intermediate-grade NHLs include subtypes like diffuse large B-cell lymphoma (DLBCL), follicular lymphoma grade 3, and mantle cell lymphoma. These lymphomas are characterized by a high proliferation rate, often with a high Ki-67 index, and are typically treated with more aggressive chemotherapy regimens. The intermediate-grade classification is based on the International Prognostic Index (IPI), which takes into account factors like age, performance status, stage, and lactate dehydrogenase (LDH) levels.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the classification of NHL has evolved with the introduction of the World Health Organization (WHO) classification system, which provides a more detailed and standardized approach to lymphoma classification.

**Correct Answer:**
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