Characteristic of group insecta is :

Options

A. Joined appendages
B. 3 pair of jointed legs
C. Chitinous exoskeleton
D. Compound eyes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a characteristic of the group Insecta. Insects are a class of invertebrates within the phylum Arthropoda.

2. **Identifying Key Features of Insects**: Insects have several distinguishing features, including:
- A chitinous exoskeleton
- A segmented body divided into three parts: head, thorax, and abdomen
- Three pairs of jointed legs
- One pair of antennae
- Compound eyes

3. **Analyzing the Options**: The options provided are:
- Joint appendages
- Three pairs of jointed legs
- Chitinous exoskeleton
- Compound eyes

4. **Determining the Most Distinctive Characteristic**: While all the options are characteristics of insects, the most distinctive feature that sets insects apart from other arthropods is the presence of three pairs of jointed legs. Other groups may share features like a chitinous exoskeleton or compound eyes, but the three pairs of jointed legs is unique to insects.

5. **Conclusion**: Therefore, the correct answer to the question is "three pairs of jointed legs," as it is a defining characteristic of the class Insecta.

**Final Answer**: Three pairs of jointed legs.

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