The cell wall of fungi is made of :

Options

A. cellulose
B. pectin
C. chitin
D. peptidoglycan

Explanation

To determine what the cell wall of fungi is made of, we can analyze the options provided:

1. **Cellulose**:
- Cellulose is primarily found in the cell walls of plants and some algae. It is not a component of fungal cell walls. Therefore, this option is incorrect.

2. **Pectin**:
- Pectin is a polysaccharide found in the cell walls of terrestrial plants, particularly in the primary cell wall and middle lamella. It is not associated with fungi, making this option also incorrect.

3. **Peptidoglycan**:
- Peptidoglycan is a structural component of bacterial cell walls, composed of sugars and amino acids. It is not found in fungi, so this option is incorrect as well.

4. **Chitin**:
- Chitin is a polymer made from N-acetylglucosamine, a derivative of glucose. It is the primary component of the cell walls in fungi and also found in the exoskeletons of arthropods. This makes chitin the correct answer.

Thus, the cell wall of fungi is made of **chitin**.

### Summary of Steps:
1. Analyze each option provided.
2. Eliminate options that do not pertain to fungi.
3. Identify the correct component that is specific to fungal cell walls.