Which of the following animals is not viviparous?

Options

A. Platypus
B. Whale
C. Flying fox (bat)
D. Elephant

Answer

To determine which of the following animals is not viviparous, we need to understand the definitions of viviparity and oviparity.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Viviparous**: Animals that give birth to live young ones. This means that the young develop inside the mother's body and are born alive.
- **Oviparous**: Animals that lay eggs, from which the young hatch outside the mother's body.

2. **Identify the Animals**:
- The animals mentioned in the question are: Platypus, Whale, Flying Fox (Bat), and Elephant.

3. **Classify the Animals**:
- All the animals listed (whale, flying fox, elephant) are mammals and are typically viviparous, meaning they give birth to live young.
- However, the Platypus (scientific name: Ornithorhynchus) is a unique mammal that lays eggs instead of giving birth to live young.

4. **Conclusion**:
- Since the question asks for the animal that is not viviparous, the answer is the **Platypus** (Ornithorhynchus), as it is oviparous.

### Final Answer:
The animal that is not viviparous is **Platypus (Ornithorhynchus)**.

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