Myelin is stained by
**Core Concept**
The question tests the student's knowledge of **histological staining techniques** and their application in identifying specific tissue components, such as **myelin** in the nervous system. Myelin is a **lipid-rich** substance that surrounds nerve fibers, facilitating the transmission of electrical impulses.
**Why the Correct Answer is Right**
The correct answer is related to the specific staining technique that targets **myelin**. Myelin can be stained using **Luxol Fast Blue**, a **histological stain** that binds to the **lipid components** of myelin, allowing for its visualization under a microscope. This staining technique is crucial for studying the **central nervous system** and diagnosing conditions affecting **myelination**.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specifically known for staining myelin.
**Option B:** Incorrect as it does not target the lipid components of myelin.
**Option D:** Incorrect because it is not typically used for myelin staining.
**Clinical Pearl / High-Yield Fact**
Remember that **demyelinating diseases**, such as **Multiple Sclerosis**, can be diagnosed by examining the **myelin** sheath using specific staining techniques.
**Correct Answer:** D. Luxol Fast Blue.