In adults, erythropoiesis occurs in

Options

A. Liver
B. Red bone marrow
C. Spleen
D. Yellow bone marrow

Answer

**Step-by-Step Solution:**

1. **Understanding Erythropoiesis**:
- Erythropoiesis is the process of producing red blood cells (RBCs), also known as erythrocytes.

2. **Identifying the Site of Erythropoiesis in Adults**:
- In adults, erythropoiesis primarily occurs in the red bone marrow. This is the main site for the production of RBCs.

3. **Considering Other Options**:
- While the liver and spleen are involved in erythropoiesis during fetal development, they do not play a significant role in adults.
- Yellow bone marrow does not participate in erythropoiesis; it is mainly involved in fat storage.

4. **Conclusion**:
- Therefore, the correct answer to the question is that in adults, erythropoiesis occurs in the red bone marrow.

**Final Answer**: In adults, erythropoiesis occurs in red bone marrow.

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