## Core Concept
The "brush-fire" pattern, also known as "brush fire" or "edge effect," refers to a radiographic appearance typically observed in imaging studies. This pattern is often associated with specific pathological conditions affecting the lung or other organs.

## Why the Correct Answer is Right
The correct answer, **D. Pulmonary infarction**, is related to the "brush-fire" or "edge" pattern because pulmonary infarction can present with a wedge-shaped or rounded pleural-based consolidation on imaging, which might resemble a "brush-fire" pattern due to its sharp, defined borders. This pattern can be seen due to the infarction's clear demarcation from the surrounding healthy lung tissue.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is also blank and does not provide any relevant information for assessment.
- **Option C:** Similarly, this option is blank and cannot be considered.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the "brush-fire" pattern or edge effect can be seen in conditions that cause sharp, demarcated lesions or consolidations in organs like the lung. Pulmonary infarction is a critical condition to consider when this pattern is observed, especially in the appropriate clinical context such as sudden onset of chest pain, dyspnea, and risk factors for thromboembolism.

## Correct Answer Line
**Correct Answer: D. Pulmonary infarction**