Most radiosensitive tissue of body is :

Options

A. Bone marrow
B. Platelet
C. Nervous tissue
D. Lymphocyte

Answer

**Step-by-Step Solution:**

1. **Understanding Radiosensitivity**:
- Radiosensitivity refers to how susceptible cells or tissues are to damage caused by ionizing radiation. This is an important concept in fields like medicine and biology, especially concerning cancer treatment and radiation exposure.

2. **Identifying the Options**:
- The options provided are:
A. Bone marrow
B. Platelets
C. Nervous tissue
D. Lymphocytes

3. **Analyzing Each Option**:
- **Bone Marrow**: This tissue contains hematopoietic stem cells that are actively dividing to produce blood cells. Due to its high rate of cell division, it is particularly sensitive to radiation.
- **Platelets**: These are not a tissue but rather a component of blood derived from megakaryocytes in the bone marrow. They are affected by radiation but are not classified as a tissue.
- **Nervous Tissue**: This tissue is generally less radiosensitive because the neurons do not divide frequently. While it can be affected by radiation, it is not the most sensitive.
- **Lymphocytes**: These are a type of white blood cell involved in the immune response. They are sensitive to radiation, but not as much as the cells found in the bone marrow.

4. **Conclusion**:
- Among the options provided, bone marrow is the most radiosensitive tissue in the body due to its high turnover rate of blood-forming cells. Therefore, the correct answer is **A. Bone marrow**.

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