**Core Concept**
Epidural anesthesia is a regional anesthetic technique where medication is injected into the epidural space surrounding the spinal cord, providing pain relief and motor blockade. Complications can arise due to the direct effect of the medication on the spinal cord and surrounding structures or due to technical issues during the procedure.

**Why the Correct Answer is Right**
The correct answer is a compilation of common complications associated with epidural anesthesia. These include:

* **Nerve root injury**: This occurs when the injection needle accidentally damages the spinal nerve roots, leading to persistent pain, numbness, or weakness.
* **Hypotension**: Epidural anesthesia can cause vasodilation and subsequent hypotension due to the sympathetic blockade of the sympathetic nervous system.
* **Infection**: As with any invasive procedure, there is a risk of infection with epidural anesthesia, which can be life-threatening if not promptly treated.
* **Headache**: Post-dural puncture headache (PDPH) is a known complication of epidural anesthesia, occurring when the dura mater is inadvertently punctured during the procedure.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is a possible complication of general anesthesia, not epidural anesthesia.
* **Option B:** While respiratory depression can occur with epidural anesthesia, especially in combination with other sedatives, it is not a primary complication of the procedure itself.
* **Option C:** This option is not a known complication of epidural anesthesia.

**Clinical Pearl / High-Yield Fact**
To minimize complications, it is essential to carefully assess the patient's medical history, ensure proper positioning, and maintain asepsis during the procedure.

**Correct Answer:** D.