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: Surgery
[{'content': 'Which of the following type of carcinoma stomach is associated with best prognosis? \nSelect and explain. \nA. Superficial spreading type, B. Ulcerative type, C. Linitis plastica type, D. Polyploid type', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Superficial spreading carcinoma is also known as early gastric cancer, superficial carcinoma is confined to mucosa and submucosa. These cancers have excellent prognosis ( approximately 90% 5 yea survival) after resection. Ref: CSDT 13/e, Page 501.', 'role': 'assistant'}]