Which of the following is mismatched w.r.t. rana tigrina?

Options

A. Hepatic portal system : Special venous connection between liver and intestine
B. Renal portal system : Special venous connection between kidneys and lower parts of the body
C. RBCs : Oval and nucleated
D. Lymph : Has proteins and RBCs

Explanation

To determine which of the following options is mismatched with respect to Rana tigrina, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Hepatic Portal System**
- The hepatic portal system in Rana tigrina refers to the venous connections between the liver and the intestine. It collects blood from the digestive organs and transports it to the liver for processing.
- **Conclusion**: This option is correctly matched.

2. **Option 2: Renal Portal System**
- The renal portal system in Rana tigrina connects the kidneys with the lower parts of the body. It allows for the return of mixed blood from the lower body to the kidneys for filtration.
- **Conclusion**: This option is also correctly matched.

3. **Option 3: RBCs Oval and Nucleated**
- In Rana tigrina, the red blood cells (RBCs) are indeed oval in shape and nucleated. This is a characteristic feature of amphibian RBCs, unlike mammals which have biconcave and non-nucleated RBCs.
- **Conclusion**: This option is correctly matched.

4. **Option 4: Limb has Proteins and RBC**
- The lymph in Rana tigrina does not contain red blood cells (RBCs) as it does in humans. In humans, lymph can contain proteins and RBCs, but in frogs, the lymph is different and does not have RBCs.
- **Conclusion**: This option is mismatched.

### Final Answer:
The mismatched option with respect to Rana tigrina is **Option 4: Limb has Proteins and RBC**.

---