Identify the odd term in each set and name the category to which the remaining 3 belong.
Example: Ovary, Fallopian tube, Ureter, Uterus.
Odd term: Ureter
Category: Parts of female reproductive system.
Pulmonary vein, Hepatic vein, Renal vein, Post caval

Explanation

To solve the question, we need to identify the odd term among the given set of terms: Pulmonary vein, Hepatic vein, Renal vein, Post caval. We will analyze each term to determine which one does not belong with the others.

**Step 1: Analyze the terms**
- **Pulmonary vein**: This vein carries oxygenated blood from the lungs to the heart.
- **Hepatic vein**: This vein carries deoxygenated blood from the liver to the heart.
- **Renal vein**: This vein carries deoxygenated blood from the kidneys to the heart.
- **Post caval (Inferior vena cava)**: This vein carries deoxygenated blood from the lower body to the heart.

...