**Core Concept**
The histological grading of breast carcinoma is essential for determining the prognosis and guiding treatment decisions. It involves evaluating various histological features of the tumor, including its cellular differentiation, mitotic activity, and tubular formation. The Nottingham histologic score is a widely used grading system that assesses these features to predict the tumor's behavior and response to therapy.

**Why the Correct Answer is Right**
Histological grading of breast carcinoma evaluates several key features, including:
* Tubular formation (presence of well-formed tubules)
* Nuclear pleomorphism (variation in nuclear size and shape)
* Mitotic count (number of cells undergoing division)
* Amount of stromal desmoplasia (formation of fibrous connective tissue)

**Why Each Wrong Option is Incorrect**
* **Option A:** Not listed, so we'll skip this option.
* **Option B:** Not a feature evaluated in the histological grading of breast carcinoma.
* **Option C:** Not a feature evaluated in the histological grading of breast carcinoma.
* **Option D:** Not a feature evaluated in the histological grading of breast carcinoma.

**Clinical Pearl / High-Yield Fact**
The Nottingham histologic score is a widely used grading system that combines the scores for tubular formation, nuclear pleomorphism, and mitotic count to predict the tumor's behavior and response to therapy. A higher score indicates a more aggressive tumor.

**Correct Answer: B.**