**Core Concept**
Cock's peculiar tumour is a rare, benign skin lesion characterized by a localized, non-cancerous proliferation of histiocytes, a type of immune cell. This condition is often associated with a distinctive clinical presentation and histopathological features.

**Why the Correct Answer is Right**
The correct answer is related to the histopathological appearance of Cock's peculiar tumour, which typically shows a collection of histiocytes, often with a central area of necrosis. This histological pattern is a result of the abnormal proliferation and accumulation of histiocytes, leading to the formation of a localized skin lesion.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the histopathological features of Cock's peculiar tumour.
**Option B:** This option is incorrect because it is not a recognized term associated with Cock's peculiar tumour.
**Option C:** This option is incorrect because it does not accurately describe the clinical presentation of Cock's peculiar tumour.

**Clinical Pearl / High-Yield Fact**
Cock's peculiar tumour is a rare but distinctive skin lesion that should be considered in the differential diagnosis of benign skin lesions, particularly those with a characteristic histopathological appearance.

**Correct Answer:** D.