Vitamin which induced maturation of R.B.C. `:-`

Options

A. `B_1`
B. A
C. `B_12`
D. D

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the vitamin that induces the maturation of red blood cells (RBCs).

2. **Identifying Key Vitamins**: The options provided are Vitamin B1, A, B12, and D. We need to determine which of these vitamins is crucial for RBC maturation.

3. **Role of Vitamins in RBC Formation**:
- RBCs originate from erythroblasts, which require certain nutrients for their development.
- Specifically, folate (Vitamin B9) and Vitamin B12 are essential for the proliferation and differentiation of erythroblasts into mature RBCs.

4. **Impact of Deficiency**: A deficiency in either folate or Vitamin B12 can lead to impaired DNA synthesis, resulting in apoptosis (cell death) of erythroblasts and ultimately causing anemia due to ineffective erythropoiesis.

5. **Specific Function of Vitamin B12**:
- Vitamin B12 is crucial for the absorption of folic acid in the body.
- It plays a significant role in the production of red blood cells. Without adequate Vitamin B12, the body cannot produce RBCs effectively, leading to conditions such as pernicious anemia.

6. **Conclusion**: Given the importance of Vitamin B12 in the maturation of RBCs, we conclude that the correct answer to the question is **Vitamin B12**.

### Final Answer:
**Vitamin B12** is the vitamin that induces the maturation of red blood cells.

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