## **Core Concept**
Wood's lamp examination is a diagnostic tool used in dermatology to help diagnose fungal and bacterial infections, among other conditions. It involves shining a special ultraviolet (UV) light on the skin to detect abnormalities. The UV light can cause certain conditions to fluoresce, or glow, which can aid in diagnosis.

## **Why the Correct Answer is Right**
The correct answer, **C. Microsporum**, is right because Microsporum species, a type of dermatophyte fungus that causes ringworm, fluoresce green under Wood's lamp examination. This green fluorescence is due to the presence of a specific compound that reacts to the UV light emitted by the Wood's lamp. This property helps in diagnosing fungal infections caused by Microsporum.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not specify a condition or organism known to be detected by green fluorescence under Wood's lamp examination.
- **Option B:** This option is incorrect as it does not correspond with the green fluorescence observed under Wood's lamp; other types of fluorescence or reactions might be associated with different options.
- **Option D:** This option is incorrect because it does not accurately represent the organism or condition associated with green fluorescence under Wood's lamp examination.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that not all fungi fluoresce under Wood's lamp. For example, Microsporum species fluoresce green, while Trichophyton and Epidermophyton species typically do not fluoresce. This distinction can be crucial for diagnosing the type of fungal infection present.

## **Correct Answer:** .