Lecithin consists of

Options

A. Glycerol molecule , one fatty acid , phosphoric acid , choline
B. Glycerol molecule , two fatty acids , choline
C. Glycerol molecule , two fatty acids , phosphoric acid , choline
D. Sphingosine , two fatty acids , phosphoric acid , choline

Answer

To determine what lecithin consists of, we need to analyze the options provided and understand the basic composition of lecithin.

### Step-by-Step Solution:

1. **Understanding Lecithin**: Lecithin is a type of phospholipid, which is a major component of cell membranes. It is important to know its basic constituents.

2. **Basic Constituents of Lecithin**:
- **Glycerol Molecule**: Lecithin contains a glycerol backbone.
- **Two Fatty Acids**: Lecithin has two fatty acid chains attached to the glycerol.
- **Phosphoric Acid**: Lecithin includes a phosphate group.
- **Choline**: Lecithin also contains choline, which is a nitrogenous compound.

3. **Analyzing the Options**:
- **Option 1**: Glycerol molecule, one fatty acid, phosphoric acid - This does not match the composition of lecithin.
- **Option 2**: Glycerol molecule, two fatty acids - This is incomplete as it lacks phosphoric acid and choline.
- **Option 3**: Glycerol molecule, two fatty acids, phosphoric acid - This option includes the necessary components but does not explicitly mention choline.
- **Option 4**: Pincercine, two fatty acids, phosphoric acid - This is incorrect as pincercine is not a component of lecithin.

4. **Identifying the Correct Option**:
- The correct answer is **Option 3**, which includes a glycerol molecule, two fatty acids, and phosphoric acid. While it doesn't explicitly mention choline, it is implied as part of the phospholipid structure.

### Conclusion:
Lecithin consists of a glycerol molecule, two fatty acids, phosphoric acid, and choline. Therefore, the correct answer is **Option 3**.

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