Which of the following are viviparous usually :-

Options

A. Lung fishes
B. Frog
C. Sharks
D. Bony fishes

Answer

To determine which of the given options are viviparous, we need to understand the definitions and characteristics of the organisms mentioned. Viviparous animals give birth to live young instead of laying eggs. Let's analyze each option step by step:

1. **Lungfishes**:
- Lungfishes are known to be oviparous, meaning they lay eggs. They do not give birth to live young.
- **Conclusion**: This option is incorrect.

2. **Frogs**:
- Frogs are also oviparous. They reproduce by laying eggs in water, which then hatch into tadpoles before maturing into adult frogs.
- **Conclusion**: This option is incorrect.

3. **Sharks**:
- Many species of sharks are viviparous. They give birth to live young after a gestation period, which is a characteristic of viviparous animals.
- **Conclusion**: This option is correct.

4. **Bony Fishes**:
- Bony fishes are primarily oviparous, as they lay eggs in water. They do not typically give birth to live young.
- **Conclusion**: This option is incorrect.

**Final Answer**: The only viviparous option among the given choices is **Sharks**.