A carbohydrate unique to arthropods is

Options

A. chitin
B. hyaluronic acid
C. chondriotion sulphate
D. waxes

Answer

### Step-by-Step Solution:

1. **Identify the Group**: The question asks for a carbohydrate that is unique to arthropods. Arthropods belong to the phylum Arthropoda, which includes insects, arachnids, and crustaceans.

2. **List Possible Carbohydrates**: The options given are chitin, hyaluronic acid, chondroitin sulfate, and waxes. We need to determine which of these is specifically associated with arthropods.

3. **Define Chitin**: Chitin is a large structural polysaccharide. It is a modified form of glucose and is known for its role in providing structural support.

4. **Location of Chitin**: Chitin is primarily found in the exoskeleton of arthropods, particularly insects. It is also present in the cell walls of fungi, but its most notable role is in the exoskeletons of arthropods.

5. **Function of Chitin**: The primary function of chitin is to provide protection and structural integrity to the body of the insect. This makes the exoskeleton hard and resilient, preventing damage and providing support.

6. **Conclusion**: Based on the information gathered, the carbohydrate unique to arthropods is **chitin**.

### Final Answer:
The carbohydrate unique to arthropods is **chitin**.

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