**Core Concept**
Stomach varices are a type of esophageal varices that occur in the stomach due to portal hypertension. The formation of varices involves the dilation of submucosal veins, which can lead to bleeding. The veins involved in stomach varices are part of the venous system that drains the stomach.

**Why the Correct Answer is Right**
The correct answer is the short gastric veins and the left gastroepiploic vein. These veins are part of the venous system that drains the stomach and are involved in the formation of stomach varices. The short gastric veins drain the fundus of the stomach, while the left gastroepiploic vein drains the body of the stomach. The dilation of these veins can lead to the formation of stomach varices.

**Why Each Wrong Option is Incorrect**
**Option A:** The right gastroepiploic vein is not typically involved in the formation of stomach varices, as it drains the greater curvature of the stomach and is not as commonly affected by portal hypertension.
**Option B:** The splenic vein is not directly involved in the formation of stomach varices, although it is part of the portal venous system that can be affected by portal hypertension.
**Option C:** The inferior mesenteric vein is not typically involved in the formation of stomach varices, as it drains the large intestine and is not directly related to the venous drainage of the stomach.

**Clinical Pearl / High-Yield Fact**
Stomach varices are a type of complication that can occur in patients with portal hypertension, and their formation is often related to the dilation of submucosal veins. Identifying the correct veins involved in the formation of stomach varices is crucial for diagnosing and managing this condition.

**Correct Answer:** C.