The component of blood that helps in clotting of blood is :

Options

A. Blood Plasma
B. Red Blood Cells
C. White blood Cells
D. Platelets

Explanation

To solve the question regarding the component of blood that helps in clotting, we can follow these steps:

### Step 1: Understand the Components of Blood
Blood consists of various components, including:
- Red Blood Cells (RBCs)
- White Blood Cells (WBCs)
- Platelets
- Blood Plasma

### Step 2: Identify the Functions of Each Component
- **Red Blood Cells (RBCs)**: These cells contain hemoglobin and are responsible for transporting oxygen throughout the body.
- **White Blood Cells (WBCs)**: These cells are part of the immune system and help in fighting infections and diseases.
- **Platelets**: These are small cell fragments that play a crucial role in blood clotting.
- **Blood Plasma**: This is the liquid component of blood that carries cells, nutrients, hormones, and waste products.

### Step 3: Focus on the Clotting Mechanism
When there is an injury to a blood vessel, platelets quickly gather at the site of the injury. They adhere to the exposed tissue and each other, forming a temporary "platelet plug." This process is essential to prevent excessive bleeding.

### Step 4: Choose the Correct Answer
Given the functions of the components of blood, the one that specifically aids in the clotting process is:
- **Platelets** (Option D).

### Final Answer
The component of blood that helps in clotting of blood is **Platelets**.

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