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
Which of the following statements is true - 
Select and explain. 
A. 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
C: Acute lymphoid leukemia in less than 1 year
Answer: C: Acute lymphoid leukemia in less than 1 year 
Explanation: . Acute lymphoid leukemia in less than 1 year