This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
[{'content': 'A 45yr old presents with paresthesia Hb 6.8 g1dL Peripheral smear shows macrocytes and neutrophils with hypersegmented nuclei Endoscopy reveals atopic gastritis Which of the following defficiency is more likely ? \nSelect and explain. \nA. VitB 12defficiency, B. Niacin deficiency, C. Riboflavin deficiency, D. Riboflavin deficiency', 'role': 'user'}, {'content': 'Answer: A \nExplanation: REF : LIPINCOTT', 'role': 'assistant'}]