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': 'Microdeletion leading to instability of DNA, causing the cell to undergo degeneration is seen as a marker in which of the following cancer? \nSelect and explain. \nA. Medullary carcinoma of thyroid, B. Small cell lung cancer, C. Gastric lymphoma, D. Colon carcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Microsatellite instability is due to impaired DNA missmatch repair. It is associated with many malignancies but colon cancer has highest association.', 'role': 'assistant'}]