Which one of the following types of cells lack nucleus in humans ?

Options

A. RBCs
B. Neutrophils
C. Eosinophils
D. None

Explanation

To answer the question "Which one of the following types of cells lack nucleus in humans?", we will analyze the provided options step by step.

### Step 1: Identify the cell types mentioned
The options given are:
1. RBCs (Red Blood Cells)
2. Neutrophils
3. Eosinophils
4. None of the above

### Step 2: Understand the characteristics of each cell type
- **RBCs (Red Blood Cells)**: These cells are also known as erythrocytes. They are unique because they lack a nucleus in their mature form. This absence allows for more space to accommodate hemoglobin, which is essential for oxygen transport.

- **Neutrophils**: These are a type of white blood cell (WBC) that have a nucleus. Their nucleus is multi-lobed, meaning it has several lobes.

- **Eosinophils**: Another type of WBC, eosinophils have a bilobed nucleus, which means their nucleus has two lobes.

- **None of the above**: This option suggests that all the previous options have a nucleus, which is incorrect based on our analysis.

### Step 3: Conclusion
From the analysis, we can conclude that the only type of cell listed that lacks a nucleus in humans is **RBCs (Red Blood Cells)**. Therefore, the correct answer is:

**RBCs (Red Blood Cells)**

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