Coxal glands are the excretory organ of :-

Options

A. Cray fish
B. Devil fish
C. Jelly - fish
D. Scorpion

Answer

To solve the question "Coxal glands are the excretory organ of:", we will analyze the options provided and determine which organism possesses coxal glands as their excretory organs.

### Step-by-Step Solution:

1. **Understand what coxal glands are**: Coxal glands are specialized excretory organs found in certain arthropods. They play a role in the excretion of waste products.

2. **Evaluate the first option - Crayfish**: Crayfish are freshwater crustaceans. They do not possess coxal glands; instead, they have gills for respiration and excretion. Therefore, this option is incorrect.

3. **Evaluate the second option - Jellyfish**: Jellyfish belong to the phylum Cnidaria and do not have specialized excretory organs. They excrete waste through their mouth, which is also the entrance for food. Thus, this option is also incorrect.

4. **Evaluate the third option - Scorpion**: Scorpions are arachnids, which are a class of arthropods. They do possess coxal glands, which function as excretory organs. This makes this option a strong candidate for the correct answer.

5. **Conclusion**: After evaluating all the options, the correct answer is that coxal glands are the excretory organs of scorpions.

### Final Answer:
Coxal glands are the excretory organ of **Scorpions**.