Zonary placenta is found in

Options

A. Carnivore mammals
B. Herbivore mammals
C. Both (a) and (b)
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Zonary Placenta**:
- The zonary placenta is characterized by a band-like structure that encircles the blastocyst. This structure is elliptical in shape and is formed in the middle of the blastocyst.

2. **Identifying the Characteristics**:
- The key feature of the zonary placenta is its band-like formation that wraps around the blastocyst, providing a specific area for nutrient exchange.

3. **Identifying the Organisms**:
- Zonary placenta is specifically found in certain groups of mammals. The question asks which mammals possess this type of placenta.

4. **Recognizing the Group**:
- Zonary placenta is primarily found in carnivorous mammals. This includes animals such as dogs, cats, and other members of the Carnivora order.

5. **Conclusion**:
- Therefore, the correct answer to the question "Zonary placenta is found in" is that it is found in carnivorous mammals.

**Final Answer**: Zonary placenta is found in carnivorous mammals.

---