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': 'A 30-yrs old female,RBC count 4.5 million, MCV 55fl, TLC 8000, no history of blood transfusion? \nSelect and explain. \nA. Iron deficiency anemia, B. Thalessemia major, C. Thalessemia minor, D. Megaloblastic anemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]