Which of the following is not a trait of marsupials ?

Options

A. Oviparous
B. Presence of teats over mammary gland
C. Presence of brood pouch
D. All of the above

Answer

To determine which of the following is not a trait of marsupials, we need to first understand what marsupials are and their characteristics.

### Step-by-Step Solution:

1. **Definition of Marsupials**: Marsupials are a group of mammals that are characterized by giving birth to relatively undeveloped young, which then continue to develop outside the womb, typically in a pouch on the mother's belly.

2. **Key Traits of Marsupials**:
- **Viviparous**: Marsupials give birth to live young (as opposed to laying eggs).
- **Presence of a Pouch**: They have a brood pouch where the young continue to develop after birth.
- **Presence of Mammary Glands**: They have mammary glands that provide nourishment to the young.

3. **Analyzing the Options**:
- **Oviparous**: This term refers to animals that lay eggs. Since marsupials give birth to live young, this is not a trait of marsupials.
- **Presence of Teeth**: Marsupials do have teeth, so this is a correct trait.
- **Presence of Brood Pouch**: This is a defining characteristic of marsupials, so it is also a correct trait.
- **All of the Above**: This option cannot be correct since we have identified that "oviparous" is not a trait of marsupials.

4. **Conclusion**: The option that is not a trait of marsupials is **Oviparous**.

### Final Answer:
**Oviparous** is not a trait of marsupials.

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