Give appropriate biological / technical terms for the following:
Vitamin required for blood coagulation.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific vitamin that is necessary for the process of blood coagulation, which is the mechanism that prevents excessive bleeding when a blood vessel is injured.

2. **Identifying the Vitamin**: The vitamin that is crucial for blood coagulation is Vitamin K.

3. **Role of Vitamin K**: Vitamin K acts as an essential cofactor for various proteins involved in the blood clotting process. It is necessary for the activation of several coagulation factors, which are proteins that help in the formation of blood clots.

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