This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AML & ALL, Subject name: Medicine
[{'content': 'Which of the following ALL will not show a dismal prognosis? \nSelect and explain. \nA. Age between 1-10 years, B. TLC > 1 lac, C. Petechiae, D. t(9:22)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prognostic factor in acute lymphoblastic leukemia Excellent prognosis Excellent prognosis t(12;21) and TEL-AML1 fusion Hyperdiploidy and trisomy of specific chromosomes (4, 10 and 17) is associated with an excellent prognosis. Age > 1 years and < 10 years Dismal prognosis t(9;22) or Philadelphia chromosome and BCR-ABL fusion Hypodiploidy with chromosome number<45 is associated with a poor prognosis Age > 10 years WBC> 50,000/cu.mm3 CNS leukemia at presentation', 'role': 'assistant'}]