Which is a mammal ?

Options

A. Psittacula
B. Manis
C. Planorbis
D. Hydrophis .

Answer

To determine which of the given options is a mammal, we need to analyze each option based on their classification.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options to choose from. We need to evaluate each one to see if it belongs to the class Mammalia.

2. **Evaluate the First Option - Cetacula**:
- The term "Cetacula" refers to a parrot.
- Parrots are birds and belong to the class Aves, not Mammalia.
- Therefore, this option is incorrect.

3. **Evaluate the Second Option - Mannus**:
- "Mannus" is another name for the pangolin or scaly anteater.
- Pangolins belong to the order Pholidota and the class Mammalia.
- They possess mammary glands and have hair on their bodies, which are characteristics of mammals.
- Thus, this option is correct.

4. **Evaluate the Third Option - Planorbis**:
- Planorbis is a genus of air-breathing freshwater snails.
- Snails belong to the phylum Mollusca, not Mammalia.
- Therefore, this option is incorrect.

5. **Evaluate the Fourth Option - Hydrophis**:
- Hydrophis refers to a genus of sea snakes.
- Sea snakes are reptiles and belong to the class Reptilia, not Mammalia.
- Thus, this option is also incorrect.

6. **Conclusion**:
- After evaluating all the options, only Mannus (the pangolin) belongs to the class Mammalia.
- Therefore, the correct answer is **Mannus**.

### Final Answer:
**Mannus (the pangolin) is a mammal.**

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