Lecithin is -

Options

A. Phospholipid
B. Carbohydrate
C. Protein
D. Amino acid

Answer

### Step-by-Step Solution:

1. **Understanding Lecithin**: Lecithin is a substance that is often categorized in the context of lipids. It is important to identify its classification correctly.

2. **Types of Lipids**: Lipids can be classified into three main categories:
- Simple Lipids (or Simple Fats)
- Complex Lipids (or Complex Fats)
- Derivative Lipids

3. **Focus on Complex Lipids**: Lecithin falls under the category of complex lipids. Complex lipids are formed by combining fats with other molecules.

4. **Examples of Complex Lipids**:
- Glycolipids: Formed when fats are attached to carbohydrates.
- Proteolipids: Formed when fats are attached to proteins.
- Phospholipids: Formed when fats are attached to phosphate groups.

5. **Identifying Lecithin**: Lecithin is specifically a phospholipid, which means it is a complex lipid that includes a phosphate group in its structure.

6. **Structure of Lecithin**: The structure of lecithin consists of:
- A glycerol backbone.
- Two fatty acid chains.
- An inorganic phosphate group attached to the glycerol.

7. **Conclusion**: Based on the classification and structure, lecithin is identified as a phospholipid.

### Final Answer:
Lecithin is a **Phospholipid**.

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