This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'An example of a tumour suppressor gene is \nSelect and explain. \nA. myc, B. fos, C. ras, D. Rb', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Robbins basic pathology 9th edition page no 182, Retinoblastoma gene is the first tumour suppressor gene to be discovered.', 'role': 'assistant'}]