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: Medicine
[{'content': 'True about α-thalassemia trait - \nSelect and explain. \nA. Increased HbF, B. Increased HbFA2, C. Microcytosis, D. Severe anemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]