Cascade process during coagulation of blood results results in the formation of an enzyme complex which is known as :

Options

A. Fibrin
B. Fibrinogen
C. Thrombin
D. Thrombokinase

Answer

To solve the question regarding the cascade process during blood coagulation and the formation of an enzyme complex, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Blood Coagulation**: Blood coagulation is a complex process that involves a series of biochemical reactions, often referred to as the "cascade process." This process is crucial for stopping bleeding and involves multiple proteins and enzymes.

2. **Identifying Key Components**: The main components involved in blood coagulation include:
- Fibrinogen: A soluble plasma protein that is converted into fibrin during coagulation.
- Thrombin: An enzyme that converts fibrinogen into fibrin.
- Thrombokinase: An enzyme that converts prothrombin (inactive) into thrombin.

3. **Analyzing the Options**: The question provides four options:
- Option 1: Fibrin
- Option 2: Fibrinogen
- Option 3: Thrombin
- Option 4: Thrombokinase

4. **Determining the Correct Answer**:
- Fibrinogen is the precursor to fibrin and is converted into fibrin by thrombin.
- Thrombin is indeed an enzyme involved in the coagulation process, but it is not the enzyme complex formed during the cascade.
- Thrombokinase is responsible for activating thrombin but is not the final enzyme complex formed.
- Fibrin is the end product of the coagulation cascade but does not represent the enzyme complex itself.

5. **Conclusion**: The correct answer to the question is **Thrombin (Option 3)**, as it is the active enzyme that plays a crucial role in the coagulation cascade.

### Final Answer:
**Thrombin (Option 3)**