Which of the following lipid does not contain phosphoric acid ?

Options

A. Lecithin
B. Cephalin
C. sphingomyelins
D. glycolipids

Answer

To determine which lipid does not contain phosphoric acid, we need to analyze each of the given options: Lecithin, Cephaline, Sphingomyelin, and Glycolipids.

### Step-by-Step Solution:

1. **Understanding Lecithin and Cephaline**:
- Both Lecithin and Cephaline are types of phospholipids.
- Phospholipids are characterized by the presence of a phosphate group in their structure.
- Therefore, both Lecithin and Cephaline **contain phosphoric acid**.

2. **Analyzing Sphingomyelin**:
- Sphingomyelin is another type of phospholipid that is found in cell membranes.
- It is composed of a sphingosine backbone, a fatty acid, and a phosphate group.
- Hence, Sphingomyelin **also contains phosphoric acid**.

3. **Examining Glycolipids**:
- Glycolipids consist of a hydrophobic lipid tail and a hydrophilic sugar group.
- They do not contain a phosphate group in their structure.
- Therefore, Glycolipids **do not contain phosphoric acid**.

4. **Conclusion**:
- Based on the analysis, the lipid that does not contain phosphoric acid is **Glycolipids**.

### Final Answer:
**Glycolipids** do not contain phosphoric acid.