which of the following is a phospholipid ?

Options

A. Lecithin
B. Glycerol
C. Oleic acid
D. Prostaglandin

Answer

To determine which of the following options is a phospholipid, we need to understand the structure and components of phospholipids.

### Step-by-Step Solution:

1. **Understanding Phospholipids**:
- Phospholipids are a class of lipids that are a major component of all cell membranes. They consist of two fatty acid tails, a glycerol backbone, and a phosphate group.

2. **Identifying Components**:
- The main components of phospholipids include:
- **Fatty Acids**: Long hydrocarbon chains that are hydrophobic (water-repelling).
- **Glycerol**: A three-carbon molecule that serves as a backbone for the phospholipid.
- **Phosphate Group**: A hydrophilic (water-attracting) group that is attached to the glycerol and contributes to the overall polarity of the molecule.

3. **Analyzing the Options**:
- **Option 1**: Lecithin - This is a well-known phospholipid found in cell membranes.
- **Option 2**: Glycerol - This is not a phospholipid; it is a component of phospholipids.
- **Option 3**: Oleic Acid - This is a type of fatty acid, not a phospholipid.
- **Option 4**: Prostaglandins - These are lipid compounds that have hormone-like effects, but they are not phospholipids.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Lecithin**, as it is a phospholipid.

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

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