Name a mammal where RBC are nucleated.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a mammal that has nucleated red blood cells (RBCs). In most mammals, RBCs are typically anucleated, meaning they do not have a nucleus.

2. **Identifying Exceptions**: While most mammals have anucleated RBCs, there are exceptions. One of the notable exceptions is the camel.

3. **Characteristics of Camel RBCs**: Camel RBCs are unique because they are nucleated. Additionally, their shape is ovoid, which is different from the typical biconcave shape seen in most mammals.

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