Which is not a member of class insecta ?

Options

A. Louse
B. Cockroach
C. Spinder
D. Musca

Answer

To determine which organism is not a member of the class Insecta, we will analyze the given options: Louse, Cockroach, Spider, and Musca.

### Step-by-step Solution:

1. **Understand the Classification**:
- The animal kingdom is divided into various phyla, and one of the largest phyla is Arthropoda, which includes organisms with jointed appendages and a chitinous exoskeleton.

2. **Identify Classes within Phylum Arthropoda**:
- The phylum Arthropoda is further divided into several classes, including:
- **Crustacea** (e.g., Lobster, Prawn, Crabs)
- **Diplopoda** (e.g., Millipedes)
- **Chilopoda** (e.g., Centipedes)
- **Arachnida** (e.g., Spiders, Ticks, Scorpions)
- **Insecta** (e.g., Grasshopper, Cockroach, Louse, Musca)
- **Merostomata** (e.g., Horseshoe crabs)

3. **Analyze Each Option**:
- **Louse**: This is an insect and belongs to the class Insecta.
- **Cockroach**: This is also an insect and belongs to the class Insecta.
- **Spider**: This organism belongs to the class Arachnida, not Insecta.
- **Musca**: This refers to the common housefly, which is an insect and belongs to the class Insecta.

4. **Conclusion**:
- From the analysis, the only organism that does not belong to the class Insecta is **Spider**. Thus, the correct answer is **Spider**.

### Final Answer:
**Spider** is not a member of class Insecta.

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