An example of marsupialia is

Options

A. Elephant
B. Horse
C. Macropus
D. Rabbit .

Answer

To solve the question "An example of marsupialia is," we need to analyze the options provided: elephant, horse, macropus, and rabbit.

### Step-by-Step Solution:

1. **Understanding Marsupialia**:
- Marsupialia is an order of mammals known for giving birth to relatively undeveloped young, which then continue to develop in a pouch on the mother's belly. Examples of marsupials include kangaroos and koalas.

2. **Analyzing the Options**:
- **Elephant**: Elephants belong to the order Proboscidea and are classified as eutherian mammals, which means they have a complex placenta and give birth to more developed young. Therefore, this is not a marsupial.
- **Horse**: Horses belong to the order Perissodactyla and are also eutherian mammals. They do not have a pouch for their young, so this is not a marsupial either.
- **Macropus**: Macropus is the scientific name for kangaroos, which are classic examples of marsupials. They give birth to underdeveloped young that continue to grow in the mother's pouch.
- **Rabbit**: Rabbits belong to the order Lagomorpha and are also eutherian mammals, not marsupials.

3. **Conclusion**:
- Among the options, the only one that represents a marsupial is **Macropus** (kangaroo).

Thus, the correct answer is **Macropus**.