Cells forms in bone marrow include

Options

A. RBC
B. RBC, leucoytes and platelets
C. Leucocytes
D. Lymphocytes

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the types of cells that are formed in the bone marrow.

2. **Identifying the Options**: The options provided are:
- Option 1: RBC (Red Blood Cells)
- Option 2: RBC, leukocytes, and platelets
- Option 3: Leukocytes
- Option 4: Lymphocytes

3. **Defining Bone Marrow**: Bone marrow is a soft, gelatinous tissue found within the cavities of bones. It plays a crucial role in the production of blood cells.

4. **Types of Bone Marrow**: There are two types of bone marrow:
- **Yellow Bone Marrow**: Primarily composed of fat cells.
- **Red Bone Marrow**: Contains hematopoietic (blood-forming) stem cells responsible for producing blood cells.

5. **Types of Cells Produced**: The red bone marrow is responsible for producing:
- **RBCs (Erythrocytes)**: Carry oxygen in the blood.
- **Leukocytes (White Blood Cells)**: Part of the immune system.
- **Platelets (Thrombocytes)**: Involved in blood clotting.

6. **Analyzing the Options**:
- **Option 1**: Only RBCs - Incomplete, as it does not include leukocytes and platelets.
- **Option 2**: RBCs, leukocytes, and platelets - This option includes all the major cell types produced in the bone marrow.
- **Option 3**: Only leukocytes - Incomplete, as it does not include RBCs and platelets.
- **Option 4**: Only lymphocytes - Incomplete, as it does not mention other types of leukocytes or platelets.

7. **Conclusion**: Based on the analysis, the correct answer is **Option 2: RBC, leukocytes, and platelets**.