This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
The most common site of GIST is - 
Select and explain. 
A. Ileum, B. Esophagus, C. Colon, D. Stomach
D: Stomach
Answer: D: Stomach 
Explanation: Gastrointestinal stromal tumors (GISTs) 

GISTs are the most common mesenchymal neoplasm of gastrointestinal tumor.
GIST represents a distinct group of gastrointestinal tumors that originate from the interstitial cells of cajal which control gastrointestinal peristalsis.
GISTs can occur anywhere in the gastroinstestinal tract; the most common site being the stomach followed by the small intestine.

Stomach → 50-70%
Small intestine → 20-30%
Colon & rectum → 5-15%
Esophagus → <5%