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': 'Specific marker for synol sarcoma is: \nSelect and explain. \nA. t (x;18), B. t (9;22), C. t (11;14), D. t (14;18)', 'role': 'user'}, {'content': "Answer: A \nExplanation: Most synol sarcomas show a characteristic chromosomal translocation t (x; 18). Ref: Robbin's Illustrated Pathology, 7th Edition, Page 1323; Harrison's Principles of Internal Medicine, 16th Edition, Page 563", 'role': 'assistant'}]