**Core Concept**
Pathological contraction ring is a complication that occurs in the setting of ischemic injury to the smooth muscle cells of the gastrointestinal tract, particularly in the context of volvulus or intussusception. It is characterized by the formation of a constrictive band around the bowel, leading to ischemia and necrosis.

**Why the Correct Answer is Right**
The pathological contraction ring is thought to result from the abnormal contraction of the affected segment of the bowel, which is caused by the release of acetylcholine and other neurotransmitters from the enteric nervous system. This leads to an uncoordinated and sustained contraction of the smooth muscle cells, resulting in the formation of a constrictive band around the bowel. The affected segment of the bowel becomes ischemic due to the compromised blood flow, leading to necrosis and potentially life-threatening complications.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the pathophysiological mechanism underlying the formation of a pathological contraction ring.

**Option B:** This option is incorrect because it refers to a different condition altogether, and is not related to the formation of a pathological contraction ring.

**Option D:** This option is incorrect because it is not a recognized cause of pathological contraction ring.

**Clinical Pearl / High-Yield Fact**
One important clinical consideration is that pathological contraction ring can occur in any part of the gastrointestinal tract, but it is most commonly seen in the small intestine. Recognizing the characteristic clinical presentation and radiographic findings is crucial for timely diagnosis and management.

**Correct Answer: C.**