**Core Concept**
The jejunum, a part of the small intestine, has a distinct pattern on X-ray due to its unique structure and contents. The jejunum contains a high concentration of air, fluid, and food residue, which affect its radiographic appearance.

**Why the Correct Answer is Right**
The jejunum's pattern on X-ray is characterized by a "rugger jaw" or "ground-glass" appearance, which results from the mixture of air, fluid, and food residue within its lumen. This appearance is due to the superimposition of multiple layers of air bubbles, fluid, and food particles. The jejunum's wall is also thinner than the ileum, making it more susceptible to distension and changes in gas and fluid content.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the jejunum typically does not have a "step-ladder" or "step-wise" appearance, which is more characteristic of the ileum.
**Option B:** This option is incorrect because the jejunum does not have a "string-of-beads" or "beaded" appearance, which is more typical of the colon.
**Option C:** This option is incorrect because the jejunum does not have a "target" or "bull's-eye" appearance, which is more characteristic of the stomach.

**Clinical Pearl / High-Yield Fact**
The jejunum's "rugger jaw" appearance can be an important radiographic clue in diagnosing conditions such as small bowel obstruction or ileus.

**Correct Answer:** C.