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': 'Which of the following statements is true - \nSelect and explain. \nA. Chronic myeloid leukemia occurs beyond 50 years of age, B. Hairy cell leukemia in less than 50 years has a good prognosis, C. Acute lymphoid leukemia in less than 1 year, D. Chronic lymphocytic leukemia occurs in less than 50 years of age', 'role': 'user'}, {'content': 'Answer: C \nExplanation: . Acute lymphoid leukemia in less than 1 year', 'role': 'assistant'}]