Following are the various structures related to spinal cord and their respective terminal extent.Choose the wrong pair::
**Core Concept**
The question tests the understanding of spinal cord anatomy, specifically the terminal extent of various structures related to the spinal cord. This involves knowledge of **spinal cord**, **cauda equina**, **conus medullaris**, and **dura mater**.
**Why the Correct Answer is Right**
The correct answer is based on the accurate terminal extent of these structures. The **conus medullaris** typically ends at the L1-L2 vertebral level, the **cauda equina** extends from the end of the **conus medullaris** down to the coccyx, and the **dura mater** ends at the level of the S2-S3 vertebrae.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the **conus medullaris** indeed ends at the L1-L2 level.
**Option B:** This option is incorrect as the **cauda equina** does extend down to the coccyx.
**Option C:** This option might be considered incorrect based on the specifics of the question, which are not fully provided.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the **conus medullaris** ends at a relatively higher level (L1-L2) compared to the **dura mater** and the **cauda equina**, which is crucial for understanding spinal anatomy and performing procedures like lumbar punctures.
**Correct Answer:** Correct Answer: D.