Book - lungs are found in :-

Options

A. Scorpion
B. Prawn
C. limulus
D. Cockroach

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks where book lungs are found. Book lungs are specialized respiratory organs.

2. **Analyze the Options**:
- **Option 1: Scorpion**: Scorpions are known to have book lungs. These are structures that facilitate gas exchange in terrestrial arthropods.
- **Option 2: Prawn**: Prawns do not have book lungs; they have gills for respiration.
- **Option 3: Limulus**: Limulus, also known as the horseshoe crab, does not possess book lungs; it has gills.
- **Option 4: Cockroach**: Cockroaches do not have book lungs; they have a tracheal system for respiration.

3. **Identify the Correct Answer**: Based on the analysis, the only organism from the options that has book lungs is the scorpion.

4. **Conclusion**: Therefore, the correct answer is that book lungs are found in **Scorpion**.

---