## **Core Concept**
The question pertains to the characteristics of wound infections, specifically the color of the discharge or exudate associated with certain types of bacterial infections. Different bacteria can produce distinct colored discharges due to the pigments they produce.

## **Why the Correct Answer is Right**
The correct answer, **C. Pseudomonas aeruginosa**, is associated with a greenish-blue or "grease" colored discharge due to the production of pyocyanin, a greenish-blue pigment. This pigment is a virulence factor that helps the bacteria compete with other microorganisms. Pseudomonas aeruginosa is an opportunistic pathogen known to cause infections in various parts of the body, particularly in immunocompromised individuals and those with cystic fibrosis.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and does not provide a choice for evaluation.
- **Option B:** This option is also blank and cannot be assessed.
- **Option D:** Similarly, this option is blank and lacks information for analysis.

## **Clinical Pearl / High-Yield Fact**
A key clinical point to remember is that **Pseudomonas aeruginosa** infections are often associated with a greenish discharge, which can be a clue to the diagnosis, especially in cases of otitis externa (swimmer's ear), where the discharge can have a characteristic blue-green color.

## **Correct Answer: C. Pseudomonas aeruginosa**