Which of the following has longest life in blood ?

Options

A. Eosinophil
B. Neutrophil
C. RBC
D. Basophil

Answer

To determine which blood component has the longest lifespan, we can analyze the lifespan of various blood cells. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Blood Components
We need to consider the following blood components:
- Eosinophils
- Neutrophils
- Red Blood Cells (RBCs)
- Basophils

### Step 2: Research Lifespan of Each Component
Next, we look up the lifespan of each of these blood components:
- **Eosinophils**: Approximately 14 hours
- **Neutrophils**: Approximately 12 hours
- **Red Blood Cells (RBCs)**: Approximately 120 days
- **Basophils**: Approximately 10 hours

### Step 3: Compare Lifespans
Now, we compare the lifespans:
- Eosinophils: 14 hours
- Neutrophils: 12 hours
- RBCs: 120 days (which is significantly longer than the others)
- Basophils: 10 hours

### Step 4: Identify the Longest Lifespan
From the comparison, it is clear that Red Blood Cells (RBCs) have the longest lifespan of approximately 120 days.

### Conclusion
Thus, the blood component with the longest lifespan is **Red Blood Cells (RBCs)**.

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