Which one has a poisonous gland .

Options

A. Frog
B. Female Wall Lizard
C. Trygon
D. Male Platypus .

Answer

**Step-by-Step Solution:**

1. **Identify the Options**: The question asks which organism has a poisonous gland. The options provided are:
- Frog
- Female wall lizard (gecko)
- Trigon (stingray)
- Male platypus

2. **Analyze the Frog**:
- Frogs can have poisonous glands, but the common species (like the tree frog, Rana) does not have a poisonous gland. Therefore, this option is not the correct answer.

3. **Examine the Female Wall Lizard**:
- The female wall lizard, also known as Hemidactylus or gecko, is generally harmless and does not possess any poisonous glands. Thus, this option is also not the correct answer.

4. **Consider the Trigon (Stingray)**:
- The Trigon, or common stingray, does not have a poisonous gland. While it can deliver a painful sting, it does not secrete poison from a gland. Therefore, this option is not the correct answer.

5. **Evaluate the Male Platypus**:
- The male platypus has specialized glands called crural glands located on its hind limbs. These glands secrete poison, particularly during the breeding season. This makes the male platypus the only option with a poisonous gland.

6. **Conclusion**:
- Based on the analysis of each option, the correct answer is the **male platypus**.

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