Opening of rectum in Frog is called

Options

A. coccyx
B. cloaca
C. anus
D. none of these

Answer

To answer the question "What is the opening of the rectum in a frog called?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Anatomy of the Frog**:
- The frog's digestive system includes the rectum, which is the final part of the large intestine.

2. **Identify the Function of the Rectum**:
- The rectum serves as the passage for waste material to exit the body.

3. **Recognize the Terminology**:
- In many animals, including frogs, the term used for the opening through which the rectum releases waste is important to know.

4. **Consider the Options Given**:
- The options provided are:
- A) Caucasus
- B) Cloaca
- C) Anus
- D) Nanophthys

5. **Evaluate Each Option**:
- **Caucasus**: This term does not relate to frog anatomy.
- **Cloaca**: This is a common opening for the excretory, urinary, and reproductive systems in frogs.
- **Anus**: While this is the term used in many animals, in frogs, it is not the correct term for the opening of the rectum.
- **Nanophthys**: This term is unrelated to frog anatomy.

6. **Conclude with the Correct Answer**:
- The correct answer is **B) Cloaca**, as it is the common exit cavity for the excretory, urinary, and reproductive systems in frogs.

### Final Answer:
The opening of the rectum in a frog is called the **Cloaca**.

---