Ureters in frog open into

Options

A. Kidneys
B. Cloaca
C. Urinary bladder
D. Anus

Explanation

### Step-by-Step Solution:

1. **Understanding the Excretory System of Frogs**:
- The excretory system in frogs consists of kidneys, ureters, urinary bladder, and cloaca.

2. **Identifying the Role of Ureters**:
- Ureters are tubes that carry urine from the kidneys to another organ. In frogs, they also have a role in the reproductive system, particularly in males where they are referred to as the urinogenital ducts.

3. **Locating the Cloaca**:
- The cloaca is a common chamber that receives waste from the urinary, digestive, and reproductive systems. It is the final exit point for these systems.

4. **Determining the Opening of Ureters**:
- In frogs, the ureters open into the cloaca. This means that urine from the kidneys flows through the ureters and into the cloaca.

5. **Evaluating the Options**:
- **Kidneys**: Incorrect, as ureters arise from the kidneys, not open into them.
- **Cloaca**: Correct, as ureters open into the cloaca.
- **Urinary Bladder**: Incorrect, as the urinary bladder has its own opening into the cloaca.
- **Anus**: Incorrect, as frogs have a cloacal aperture instead of a separate anus.

6. **Conclusion**:
- The ureters in frogs open into the cloaca.

### Final Answer:
Ureters in frogs open into the **cloaca**.

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