Plasma thromboplastin component is known as

Options

A. Stuart factor
B. Hageman factor
C. Christmas factor
D. Labile factor

Answer

To solve the question "Plasma thromboplastin component is known as", we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the alternative name of the Plasma thromboplastin component. This component is related to blood coagulation.

2. **Identifying the Options**: The options given are:
- Option A: Stuart factor
- Option B: Hageman factor
- Option C: Christmas factor
- Option D: Labial factor

3. **Researching Each Factor**:
- **Stuart factor**: This is known as factor 10 in the coagulation cascade.
- **Hageman factor**: This is known as factor 12, which is involved in the intrinsic pathway of coagulation.
- **Christmas factor**: This is known as factor 9, which is also referred to as Plasma thromboplastin component.
- **Labial factor**: This is known as factor 5, which is part of the prothrombinase complex.

4. **Determining the Correct Answer**: From the information gathered, we can conclude that the Plasma thromboplastin component is indeed known as the Christmas factor, which corresponds to option C.

5. **Final Answer**: Therefore, the correct answer to the question is **Option C: Christmas factor**.