Which one is egg laying mammal ?

Options

A. Macropus
B. Didephis
C. Echidnal/Ornithorhynchus
D. Sorex.

Answer

To determine which one of the given options is an egg-laying mammal, we can analyze each option step by step:

1. **Identify the Options**: The options given are:
- Macropus
- Didelphis
- Echidna
- Sorex

2. **Examine Each Option**:
- **Macropus**: This is a genus that includes kangaroos and wallabies. Macropus is viviparous, meaning it gives birth to live young rather than laying eggs.
- **Didelphis**: This is a genus that includes opossums. Like Macropus, Didelphis is also viviparous and gives birth to live young.
- **Echidna**: This is known as the spiny anteater. Echidnas are unique among mammals because they are one of the few groups that lay eggs. Therefore, they are classified as egg-laying mammals.
- **Sorex**: This is a genus that includes shrews. Sorex is also viviparous and gives birth to live young.

3. **Conclusion**: Among the options provided, the only egg-laying mammal is the **Echidna**.

Thus, the answer is **Echidna**.

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