Name the largest vein of human body.

Explanation

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the name of the largest vein in the human body.

2. **Recall the Major Veins**: Consider the major veins in the human body, particularly those that return blood to the heart.

3. **Differentiate Between the Major Veins**:
- The **Superior Vena Cava** collects blood from the upper body.
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