This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'A 20yr old 0 presented with Yo of fatigue and tiredness On investigation Hb 9gmt Mcv 10% FL . PS shows macrocytic RBC&;s with hypersegmented neutrophils what is the most likely diagnosis \nSelect and explain. \nA. Iron defficiency anemia, B. Pb poisoning, C. alcoholism, D. Anemia of chronic disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ref : harrisons 21st ed', 'role': 'assistant'}]