Pick out the odd one

Options

A. Coccyx
B. Conus medullaris
C. Cauda equina
D. Filum terminale

Answer

To solve the question of picking out the odd one from the given options, we will analyze each option step by step.

### Step 1: Understand the Options
The options provided are:
1. COGCY
2. CORNUS medullaris
3. QUADA equine
4. FLAMINTIM terminale

### Step 2: Identify the Nature of Each Option
- **COGCY**: This refers to the coccyx, which is the tailbone and part of the vertebral column. It is a bony structure.
- **CORNUS medullaris**: This is a structure at the end of the spinal cord, consisting of nerve fibers.
- **QUADA equine**: This refers to a bundle of spinal nerves located at the lower end of the spinal cord.
- **FLAMINTIM terminale**: This is a fibrous extension of the spinal cord that anchors it to the coccyx.

### Step 3: Categorize the Options
Now, we categorize the options based on whether they are spinal nerves or not:
- **Spinal Nerves**: CORNUS medullaris, QUADA equine, FLAMINTIM terminale
- **Not a Spinal Nerve**: COGCY (coccyx)

### Step 4: Identify the Odd One Out
From the categorization, we can see that:
- COGCY is the only option that is not a spinal nerve; it is a bony structure of the vertebral column.

### Conclusion
Thus, the odd one out is **COGCY**.

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