Green glands are excretory in function which are found in

Options

A. Spiders
B. Moths
C. Scorpions
D. Cray fishes (Prawn)

Explanation

**Step-by-Step Solution:**

1. **Understanding Green Glands**: Green glands are specialized excretory organs that are primarily found in certain aquatic organisms. They play a crucial role in the elimination of waste products from the body.

2. **Identifying the Organisms**: The question provides a list of organisms: spiders, moths, scorpions, and crayfish. We need to determine which of these organisms possess green glands as their excretory organs.

3. **Analyzing Each Option**:
- **Spiders**: These arachnids do not have green glands; they utilize Malpighian tubules for excretion.
- **Moths**: Similar to spiders, moths also excrete waste through Malpighian tubules.
- **Scorpions**: Like spiders and moths, scorpions use Malpighian tubules for excretion.
- **Crayfish**: Crayfish are crustaceans that possess green glands, which are responsible for excretion.

4. **Conclusion**: Based on the analysis, the organism that has green glands as its excretory organs is the crayfish.

5. **Final Answer**: Therefore, the correct answer to the question is **crayfish**.

---