RBC of frog is -

Options

A. Oval and nucleate
B. Circular and nucleate
C. Oval and enucleate
D. Biconcave and enucleate

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of RBCs**:
- In frogs, the red blood cells (RBCs) are different from those in humans. Human RBCs are typically biconcave and lack a nucleus (anucleated), while frog RBCs are oval and contain a nucleus (nucleated).

2. **Comparing Frog and Human RBCs**:
- Frog RBCs are oval in shape, which is a key distinguishing feature. In contrast, human RBCs are circular and do not have a nucleus.

3. **Identifying Key Characteristics**:
- The characteristics of frog RBCs include:
- Shape: Oval
- Nucleus: Present (nucleated)
- Size: Generally larger than human RBCs

4. **Conclusion**:
- Based on the above characteristics, the correct description of frog RBCs is that they are "oval and nucleated". This differentiates them from human RBCs, which are "circular and anucleated".

5. **Final Answer**:
- The RBC of a frog is oval and nucleated.