Abnormal increase in number of RBC in blood is called

Options

A. Anemia
B. Polycythemia
C. Leukemia
D. Sarcoma

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes an abnormal increase in the number of red blood cells (RBCs) in the blood.

2. **Identifying RBCs**: Red blood cells, also known as erythrocytes, are responsible for transporting oxygen throughout the body.

3. **Analyzing the Options**:
- **Option 1: Anemia**: Anemia is a condition characterized by a deficiency of healthy red blood cells, leading to a decrease in their number. Therefore, this option does not relate to an increase in RBCs and is incorrect.

- **Option 2: Polycythemia**: This term refers specifically to an increase in the number of red blood cells and hemoglobin concentration in the blood. This condition can lead to thicker blood, which may slow down blood flow and increase the risk of clot formation. Hence, this option is correct.

- **Option 3: Leukemia**: Leukemia is a type of cancer that affects blood-forming tissues and does not specifically relate to an increase in RBCs. It primarily affects white blood cells, making this option incorrect.

- **Option 4: Sarcoma**: Sarcoma is a type of cancer that arises from connective tissues and is not related to red blood cells. Thus, this option is also incorrect.

4. **Conclusion**: After analyzing all the options, the correct answer to the question is **polycythemia**, which denotes the abnormal increase in the number of red blood cells in the blood.

**Final Answer**: The abnormal increase in the number of RBCs in blood is called **polycythemia**.

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