In frog, heart is enclosed within two-layered sac called

Options

A. Mesorchium
B. Pericardium
C. Pleura
D. Conus arteriosus

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the two-layered sac that encloses the heart of a frog.

2. **Identifying the Options**: The options provided are:
- Asemizochium
- Pericardium
- Pleura
- Conus atriosis

3. **Analyzing Each Option**:
- **Asemizochium**: This term does not relate to the heart's structure in frogs.
- **Pericardium**: This is known to be a double-layered sac that surrounds the heart in many animals, including frogs.
- **Pleura**: This refers to the protective layer surrounding the lungs, not the heart.
- **Conus atriosis**: This is a sac-like structure associated with the ventricle of the heart but is not the enclosing sac.

4. **Conclusion**: Based on the analysis, the correct answer is **Pericardium**, as it is the two-layered sac that encloses the heart of the frog.

5. **Final Answer**: The heart of the frog is enclosed within a two-layered sac called the **Pericardium**.

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