Continuous bleeding from an injured part of body is due to deficiency of

Options

A. vitamin-A
B. vitamin-B
C. vitamin-K
D. vitamin-E

Explanation

To solve the question regarding the continuous bleeding from an injured part of the body, we need to understand the role of various vitamins in the blood clotting mechanism. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Clotting Mechanism
The blood clotting process involves a series of reactions known as the clotting cascade. This cascade includes various clotting factors that work together to form a blood clot.

**Hint:** The clotting cascade is a series of reactions that lead to the formation of a blood clot.

### Step 2: Identify Key Components
One of the key components in the clotting cascade is prothrombin, which is also known as clotting factor II. Prothrombin is converted into thrombin, which then helps convert fibrinogen into fibrin, forming the mesh that constitutes a blood clot.

**Hint:** Prothrombin is crucial for the conversion to thrombin, which is essential for clot formation.

### Step 3: Role of Vitamin K
Vitamin K is essential for the synthesis of prothrombin in the liver. Without adequate vitamin K, the body cannot produce sufficient prothrombin, leading to a defective clotting mechanism.

**Hint:** Vitamin K is necessary for synthesizing prothrombin, which is vital for blood clotting.

### Step 4: Consequences of Vitamin K Deficiency
A deficiency in vitamin K results in a reduced amount of prothrombin, which can lead to continuous bleeding from injuries due to the inability to form effective blood clots.

**Hint:** Lack of vitamin K leads to insufficient prothrombin, causing continuous bleeding.

### Step 5: Evaluate Other Vitamins
While the question mentions other vitamins (A, B, and E), they do not play a direct role in the clotting mechanism. Vitamin A is related to vision, vitamin B is involved in various metabolic processes, and vitamin E is associated with reproductive health.

**Hint:** Consider the specific functions of each vitamin to determine their relevance to blood clotting.

### Conclusion
Based on the understanding that vitamin K is essential for the synthesis of prothrombin, the correct answer to the question is that continuous bleeding from an injured part of the body is due to a deficiency of **Vitamin K**.

**Final Answer:** Vitamin K (Option 3).