**Core Concept**
The Cart Wheel sign is a radiological finding seen on computed tomography (CT) scans, particularly in the abdomen. It is an indirect sign of a specific type of intestinal obstruction, which involves the twisting of a portion of the intestine around its mesenteric axis, constricting blood flow and causing ischemia.

**Why the Correct Answer is Right**
The Cart Wheel sign is a characteristic imaging feature of midgut volvulus, a type of intestinal malrotation where the small intestine twists around its mesenteric axis. This twisting motion causes the intestine to become constricted, leading to a decrease in blood flow and potentially resulting in ischemia. The Cart Wheel sign is thought to represent the twisted mesenteric vessels, which resemble the spokes of a cart wheel.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Cart Wheel sign is not typically associated with sigmoid volvulus, which presents with a different set of radiological findings, such as the "coffee bean" sign.
**Option B:** This option is incorrect because the "whirlpool" sign is a different radiological feature that is seen in cases of superior mesenteric artery (SMA) syndrome, not midgut volvulus.
**Option C:** This option is incorrect because the "bird's beak" sign is a feature of intussusception, a different type of intestinal obstruction that involves the telescoping of one segment of intestine into another.

**Clinical Pearl / High-Yield Fact**
The Cart Wheel sign is a critical radiological finding that can quickly suggest the diagnosis of midgut volvulus, a surgical emergency that requires prompt treatment to avoid ischemic bowel damage.

**Correct Answer: C. Midgut volvulus**