Which one of the following is a poisonous amphibian?

Options

A. Hyla
B. Bufo marinus
C. Rana tigrina
D. Necturus

Answer

To determine which of the following is a poisonous amphibian, we will analyze each option provided:

1. **Hyla**: This is commonly known as the tree frog. Tree frogs are generally not poisonous; they are known for their vibrant colors but do not possess toxic secretions that can harm humans.

2. **Bufo Marinus**: This is the scientific name for the cane toad, which is indeed a poisonous amphibian. Cane toads secrete toxins from their skin that can be harmful to predators and can cause various symptoms in humans, such as irritation and hallucinations.

3. **Rana Tigrina**: This is commonly known as the Indian bullfrog. While they can be large and have some defensive mechanisms, they are not considered poisonous.

4. **Necturus**: This refers to the mudpuppy, which is an aquatic salamander. Mudpuppies are not poisonous and are generally safe to handle.

Based on this analysis, the poisonous amphibian among the options is **Bufo Marinus**.

### Step-by-Step Solution:
1. **Identify the options**: The options given are Hyla, Bufo Marinus, Rana Tigrina, and Necturus.
2. **Research each option**:
- Hyla: Tree frog, non-poisonous.
- Bufo Marinus: Cane toad, known for its toxic secretions.
- Rana Tigrina: Indian bullfrog, non-poisonous.
- Necturus: Mudpuppy, non-poisonous.
3. **Determine which is poisonous**: Bufo Marinus is the only amphibian among the options that is poisonous.
4. **Conclude the answer**: The correct answer is Bufo Marinus.