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
[{'content': 'What is false about GIST - \nSelect and explain. \nA. Associated with c-kit mutation, B. Most common site is stomach, C. Associated with CD 117, D. Least common mesenchymal neoplasm of gastrointestinal tract', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- D. Least common mesenchymal neoplasm of gastrointestinal tractGISTs are the most common mesenchymal neoplasm of gastrointestinal tract.The most useful marker of GIST is c-kit (CD-117).The most common site being the stomach followed by small intestine.', 'role': 'assistant'}]