Mark the odd ones is each of the following—
Renal pelvis, medullary pyramid, renal cortex, ureter.

Explanation

To solve the question of identifying the odd one out from the given options: renal pelvis, medullary pyramid, renal cortex, and ureter, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures**:
- Renal pelvis: A funnel-shaped structure in the kidney that collects urine.
- Medullary pyramid: Cone-shaped tissues in the kidney that contain the nephrons.
- Renal cortex: The outer layer of the kidney where filtration occurs.
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