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': 'A2 concentration in thalassemia trait is ? \nSelect and explain. \nA. 1, B. 1-2.5, C. 2.5-3.5, D. >3 .5', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., > 3.5 T. Major Intermedia T. Minor J Genetics Homozygous Double Heterozygot es heterozygotes Hb F 30-90% (20-100%) 0-5% ) HbA2 < 3.5% <3.5% 3.6 -8%", 'role': 'assistant'}]