This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'GIST is most common in \nSelect and explain. \nA. Stomach, B. Duodenum, C. Ileum, D. Rectum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common nonepithelial tumour of the gastrointestinal tract in which most common site is the stomach about 50%, small intestine constitute about 25%, rectum 15% & colon 10 %. Reference SRB 5 th edition page no. 857', 'role': 'assistant'}]