**Core Concept**
Spinal anaesthesia in children requires careful consideration of the anatomy and physiology of the pediatric spine. The level of injection is critical to avoid complications such as nerve damage or inadequate anaesthesia.

**Why the Correct Answer is Right**
In children, the spinal cord terminates at a higher level than in adults, typically at the level of L3-L4, due to the differential growth rates of the vertebral bodies and the spinal cord. To avoid injury to the spinal cord, spinal anaesthesia in children is typically administered at the L3-L4 or L4-L5 interspace. This allows for adequate anaesthesia while minimizing the risk of neurological complications.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the level of injection is too high, increasing the risk of spinal cord injury.
**Option B:** This option is incorrect because the level of injection is too low, potentially leading to inadequate anaesthesia or increased risk of nerve damage.
**Option C:** This option is incorrect because it is a distractor and not a commonly used level for spinal anaesthesia in children.

**Clinical Pearl / High-Yield Fact**
In pediatric patients, the level of spinal cord termination is higher than in adults, and the surgeon should always verify the level of the conus medullaris before administering spinal anaesthesia.

**Correct Answer:** C