Which of the following animals give birth to young ones ?

Options

A. Omithorhynchus and Echidna
B. Macropus and Pteropus
C. Balaenoptera and Homo sapiens
D. Both (b) and (c )

Answer

### Step-by-Step Solution:

1. **Understanding Viviparous Animals**:
- Viviparous animals are those that give birth to live young ones. This process involves the development of the zygote inside the female's body.

2. **Development Process**:
- In viviparous animals, the fertilized egg (zygote) develops within the female's body until it reaches maturity. After a certain period, the fully developed young one is delivered outside the female's body.

3. **Comparison with Oviparous Animals**:
- Oviparous animals, on the other hand, lay eggs outside their body. The fertilized eggs develop and mature outside the female's body. Therefore, they do not give birth to live young ones.

4. **Analyzing the Options**:
- The question provides a list of animals, and we need to identify which ones are viviparous.
- **Option A: Ornithorhynchus Anacidina** - This is incorrect as it is an oviparous animal (lays eggs).
- **Option B: Macropus** - This is a viviparous animal (gives birth to live young).
- **Option C: Pteropus** - This is also a viviparous animal (gives birth to live young).
- **Option D: Balanoptera** - This is a viviparous animal (gives birth to live young).
- **Option E: Homo sapiens** - This is a viviparous animal (gives birth to live young).

5. **Conclusion**:
- The correct options that represent animals giving birth to young ones are B (Macropus), C (Pteropus), D (Balanoptera), and E (Homo sapiens).
- Therefore, the answer to the question is **both B and C** (Macropus and Pteropus) as they are specifically mentioned in the context of the question.

### Final Answer:
The animals that give birth to young ones are **both B (Macropus) and C (Pteropus)**.

---