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 25 yr old female presented with malaise and generalized weakness since 6 months. Her appetite is reduced and she has giddiness and palpitations on and off. There was no organomegaly. Laboratory study showed normochromic to hypochromic anaemia, RDW=60, and MCV=50. What is the diagnosis ? \nSelect and explain. \nA. Thalasemia minor, B. Iron deficiency anaemia, C. Chronic malaria, D. Folate deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]