**Core Concept**
Ghon's focus with hilar lymphadenopathy is a radiological finding associated with primary tuberculosis. It represents the initial site of infection in the lung, typically located in the upper lobes, with accompanying lymph node enlargement in the hilar region.

**Why the Correct Answer is Right**
Ghon's focus is a granulomatous lesion formed in response to the infection, characterized by the presence of caseating granulomas. The hilar lymphadenopathy is due to the spread of the infection to the lymph nodes, leading to their enlargement. This combination of findings is a classic manifestation of primary tuberculosis. The Ghon's complex, which includes the Ghon's focus and the affected lymph nodes, is a hallmark of primary tuberculosis.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the radiological findings associated with primary tuberculosis.
**Option B:** This option is incorrect because it refers to a different condition, specifically a type of lung cancer.
**Option C:** This option is incorrect because it is a term used to describe a different type of lung infection, not primary tuberculosis.

**Clinical Pearl / High-Yield Fact**
The Ghon's complex is a classic radiological finding in primary tuberculosis, and its identification is crucial for making an early diagnosis. Remember the acronym "Ghon's complex" to associate with primary tuberculosis.

**Correct Answer:** D. Primary tuberculosis.