**Core Concept**
Conversion disorder, also known as functional neurological symptom disorder, is a condition where a person experiences neurological symptoms (e.g., weakness, paralysis, or seizures) that cannot be explained by any underlying medical condition, despite thorough medical evaluation. This disorder is characterized by the conversion of psychological distress into physical symptoms.

**Why the Correct Answer is Right**
Conversion disorder typically involves the misattribution of psychological distress as a physical symptom, often as a coping mechanism or defense against the emotional pain. The symptoms are usually not intentionally fabricated and can be quite convincing, making it challenging to distinguish from organic neurological conditions. The symptoms may be related to past traumatic experiences, stress, or other psychological factors.

**Why Each Wrong Option is Incorrect**
**Option A:** Conversion disorder is characterized by the presence of neurological symptoms that cannot be explained by any underlying medical condition, making this statement true.
**Option B:** Conversion disorder often involves the misattribution of psychological distress as a physical symptom, which is a key feature of the condition, making this statement true.
**Option C:** This option is incorrect because conversion disorder involves the presence of neurological symptoms that cannot be explained by any underlying medical condition, not a lack of symptoms.

**Clinical Pearl / High-Yield Fact**
Conversion disorder often presents with symptoms that are inconsistent with the underlying medical evaluation, and a thorough psychological assessment is essential to diagnose this condition.

**Correct Answer: D. This option is incorrect because conversion disorder involves the presence of neurological symptoms that cannot be explained by any underlying medical condition, not a lack of symptoms.