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': 'On medical check up of a Punjabi student following findings were seen Hb of 9.9gm/d1, RBC count of 5.1 million, MCV of 62.5 fl and RDW of 13.51%. What is the most probable diagnosis ? \nSelect and explain. \nA. HbD, B. Thalassemia trait, C. Iron deficiency anemia, D. Anemia of chronic disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Thalassemia traitNormal RDW with low MCV is seen in-- Anemia of chronic diseaseHeterozygous thalassemia (Thalassemia trait)Hemoglobin E trait.', 'role': 'assistant'}]