Process by which blood cells are formed in bone marrow `:-`

Options

A. Haemopoiesis
B. Haemolysis
C. Thrombopoesis
D. Erythroblastosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the process by which blood cells are formed in the bone marrow.

2. **Identifying the Correct Term:** The process of blood cell formation is known as hemopoiesis (or hematopoiesis). This is the primary term used to describe the synthesis of blood cells within the bone marrow.

3. **Analyzing the Options:**
- **Hemopoiesis:** This is the correct answer as it refers to the formation of all types of blood cells (red blood cells, white blood cells, and platelets) in the bone marrow.
- **Hemolysis:** This term refers to the destruction or rupture of red blood cells, not their formation. Therefore, it is incorrect.
- **Thrombopoiesis:** This specifically refers to the formation of platelets. While platelets are blood cells, the question is asking about blood cells in general, making this option incorrect.
- **Erythroblastosis:** This is a condition related to the destruction of red blood cells, often due to Rh incompatibility. It does not refer to the formation of blood cells, so it is also incorrect.

4. **Conclusion:** The correct answer to the question is **hemopoiesis**, as it encompasses the formation of all blood cells in the bone marrow.

**Final Answer:** Hemopoiesis

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