Select the correct set of animals of class-mammalia

Options

A. Lion , Bat , Whale , Ostrich
B. Lion , Penguin , Bat and Hippopotamus
C. Kangaroo, Hippopotamus , Penguin and Whale
D. Kangaroo, Bat , Whale and Hippopotamus .

Answer

To solve the question of selecting the correct set of animals belonging to the class Mammalia, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Characteristics of Mammals**:
- Mammals are characterized by the presence of mammary glands in females, which produce milk for feeding their young.
- They also have hair or fur covering their bodies.
- Mammals possess a diaphragm that aids in breathing.
- Most mammals have seven cervical vertebrae.

2. **Evaluate Each Set of Animals**:
- We will analyze each set of animals provided in the question to determine if they belong to the class Mammalia.

3. **Set 1: Lion, Bat, Whale, Ostrich**:
- Lion: Yes, belongs to Mammalia.
- Bat: Yes, belongs to Mammalia.
- Whale: Yes, belongs to Mammalia.
- Ostrich: No, belongs to the class Aves (birds).
- **Conclusion**: This set is incorrect due to the presence of the ostrich.

4. **Set 2: Lion, Penguin, Bat, Hippopotamus**:
- Lion: Yes, belongs to Mammalia.
- Penguin: No, belongs to Aves (birds).
- Bat: Yes, belongs to Mammalia.
- Hippopotamus: Yes, belongs to Mammalia.
- **Conclusion**: This set is incorrect due to the presence of the penguin.

5. **Set 3: Kangaroo, Hippopotamus, Penguin, Whale**:
- Kangaroo: Yes, belongs to Mammalia.
- Hippopotamus: Yes, belongs to Mammalia.
- Penguin: No, belongs to Aves (birds).
- Whale: Yes, belongs to Mammalia.
- **Conclusion**: This set is incorrect due to the presence of the penguin.

6. **Set 4: Kangaroo, Bat, Whale, Hippopotamus**:
- Kangaroo: Yes, belongs to Mammalia.
- Bat: Yes, belongs to Mammalia.
- Whale: Yes, belongs to Mammalia.
- Hippopotamus: Yes, belongs to Mammalia.
- **Conclusion**: All animals in this set belong to Mammalia.

7. **Final Answer**: The correct set of animals belonging to the class Mammalia is **Set 4: Kangaroo, Bat, Whale, Hippopotamus**.