Formation of platelets is known as
(a) Haemopoiesis
(b) Thrombopoiesis
(c) Haemolysis
(d) None of these

Options

A. Haemopoiesis
B. Thrombopoiesis
C. Haemolysis
D. None of these.

Answer

To determine the correct answer to the question "Formation of platelets is known as", we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Platelets**:
- Platelets are also known as thrombocytes. They are crucial for blood clotting and are formed from larger cells in the bone marrow.

**Hint**: Remember that platelets are essential for the clotting process in the blood.

2. **Identifying the Mother Cell**:
- The mother cell that produces platelets is called a megakaryocyte. This cell is located in the bone marrow.

**Hint**: Think about where blood cells are produced in the body.

3. **Process of Platelet Formation**:
- The formation of platelets occurs through a process called fragmentation of the megakaryocyte. This process is specifically termed thrombopoiesis.

**Hint**: Focus on the prefix "thrombo-" which relates to platelets.

4. **Analyzing the Options**:
- (a) **Haemopoiesis**: This refers to the production of all blood components, including red blood cells (RBCs) and white blood cells (WBCs), but not specifically platelets.
- (b) **Thrombopoiesis**: This is the correct term for the formation of platelets.
- (c) **Haemolysis**: This refers to the breakdown or destruction of blood cells, which is not related to the formation of platelets.
- (d) **None of these**: This option is incorrect since we have identified the correct term.

**Hint**: Eliminate options that do not specifically relate to the formation of platelets.

5. **Conclusion**:
- The correct answer is (b) **Thrombopoiesis**.

### Final Answer:
(b) Thrombopoiesis