The Vitamin responsible for the coagulation of blood is :

Options

A. Vitamin `B_(1)`
B. Vitamin `D`
C. Vitamin `K`
D. Vitamin `C`

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which vitamin is responsible for the coagulation (clotting) of blood.

2. **Identifying the Options**: The options provided are:
- Option 1: Vitamin B1
- Option 2: Vitamin D
- Option 3: Vitamin K
- Option 4: Vitamin C

3. **Analyzing Each Vitamin**:
- **Vitamin B1**: Also known as thiamine, it is important for metabolism and energy production but is not involved in blood coagulation.
- **Vitamin D**: This vitamin is crucial for bone health and calcium absorption but does not play a direct role in blood coagulation.
- **Vitamin K**: This vitamin is essential for the synthesis of certain proteins that are required for blood coagulation. A deficiency in vitamin K can lead to excessive bleeding.
- **Vitamin C**: Known for its role in collagen synthesis and immune function, it does not directly affect blood coagulation.

4. **Conclusion**: Based on the analysis, the vitamin responsible for the coagulation of blood is **Vitamin K** (Option 3).

5. **Final Answer**: The answer is Vitamin K.

---