The rspiratory organs are book lungs in

Options

A. Arachnida
B. Diplopoda
C. Chilopoda
D. Insecta

Answer

To solve the question regarding which group of animals has book lungs as their respiratory organs, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which group of animals possesses book lungs as their respiratory organs.

2. **Identify the Options**: The options provided are:
- a. Archinida
- b. Diplopoda
- c. Chilopoda
- d. Insecta

3. **Recall Information about Book Lungs**: Book lungs are specialized respiratory structures that are found in certain arachnids. They are named for their appearance, which resembles the pages of a book.

4. **Determine the Group with Book Lungs**:
- **Archinida**: This class includes spiders and scorpions, which are known to have book lungs.
- **Diplopoda**: This class includes millipedes, which do not have book lungs.
- **Chilopoda**: This class includes centipedes, which also do not possess book lungs.
- **Insecta**: Insects generally have tracheal systems for respiration, not book lungs.

5. **Conclude the Answer**: Since book lungs are characteristic of the class Archinida, the correct answer is option A: Archinida.

### Final Answer:
The respiratory organs are book lungs in **Archinida**.

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