Blood does not clot due to deficiency of

Options

A. Vit C
B. Vit `B_(6)`
C. Vit `B_(1)`
D. Vit K

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the deficiency that leads to the inability of blood to clot. This is a crucial aspect of human health and relates to various vitamins and their functions in the body.

2. **Analyzing the Options**: The options given are:
- A) Vitamin C
- B) Vitamin B6
- C) Vitamin B1
- D) Vitamin K

3. **Evaluating Each Option**:
- **Option A: Vitamin C** - Deficiency of Vitamin C leads to scurvy, which is characterized by symptoms like bleeding gums and weakness, but it does not directly cause blood clotting issues.
- **Option B: Vitamin B6** - A deficiency in Vitamin B6 can lead to anemia, but again, it is not primarily associated with blood clotting problems.
- **Option C: Vitamin B1** - Deficiency of Vitamin B1 (thiamine) leads to beriberi, which affects the nervous system and cardiovascular health, but does not affect blood clotting.
- **Option D: Vitamin K** - Vitamin K is essential for the synthesis of certain proteins required for blood coagulation (clotting). A deficiency in Vitamin K leads to conditions like hemophilia, where blood does not clot properly.

4. **Conclusion**: Based on the analysis of the options, the correct answer is **Vitamin K**. Blood does not clot due to a deficiency of Vitamin K.