**Core Concept**
Gastrojejunocolic fistula is a type of enterocutaneous fistula that involves the formation of an abnormal connection between the stomach, jejunum, and colon. This condition often arises due to a complication of gastrointestinal surgery, such as a perforation or anastomotic leak.

**Why the Correct Answer is Right**
The highest pickup for a gastrojejunocolic fistula is typically by the colon, as the fistulous tract usually originates from the colon and extends to the stomach and jejunum. This is because the colon is a larger and more muscular organ, providing a larger surface area for the fistula to form. The formation of a gastrojejunocolic fistula often involves a breach in the colonic wall, allowing intestinal contents to leak into the stomach and jejunum.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the stomach is not the primary site for fistula formation, as it is a smaller organ compared to the colon.
**Option B:** This option is incorrect because the jejunum, although involved in the fistula, is not the primary site for fistula pickup due to its smaller size compared to the colon.
**Option C:** This option is incorrect because it is a distractor and not a relevant option for fistula pickup.

**Clinical Pearl / High-Yield Fact**
A gastrojejunocolic fistula often presents with symptoms of malabsorption, including weight loss, diarrhea, and abdominal pain. It is essential to diagnose and manage this condition promptly to prevent further complications, such as electrolyte imbalances and dehydration.

**Correct Answer:** C.