**Core Concept**
A splenic rupture is a life-threatening condition where the spleen tears, causing internal bleeding. On a plain abdominal X-ray, certain features may indicate a splenic rupture. These features include changes in the surrounding anatomy and the spleen itself.

**Why the Correct Answer is Right**
The correct answer is **C. Obliteration of colonic air hubble** because a splenic rupture does not directly affect the colon or its air content. In a splenic rupture, the spleen's enlargement or displacement may compress or obscure the adjacent structures, such as the psoas shadow (Option A) or the splenic outline (Option B), and cause an elevation of the left hemidiaphragm (Option D) due to the accumulation of blood or the spleen itself pushing upwards. However, the colon's air content is not directly related to splenic rupture.

**Why Each Wrong Option is Incorrect**
**Option A:** Obliteration of psoas shadow is a possible feature of splenic rupture due to the spleen's enlargement or displacement compressing the psoas muscle, which is a key structure adjacent to the spleen.

**Option B:** Obliteration of splenic outline is indeed a feature of splenic rupture, as the spleen may become enlarged or displaced, making its outline difficult to discern on a plain X-ray.

**Option D:** Elevation of left hemidiaphragm is also a possible feature of splenic rupture, as the accumulation of blood or the spleen's enlargement can push the hemidiaphragm upwards.

**Clinical Pearl / High-Yield Fact**
Remember that a splenic rupture can be challenging to diagnose on a plain X-ray, and a high index of suspicion is necessary. A splenic rupture often requires further imaging, such as CT or ultrasound, for accurate diagnosis and management.

**✓ Correct Answer: C. Obliteration of colonic air hubble**