<prompt> 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 ?VitB 12defficiencyNiacin deficiencyRiboflavin deficiencyRiboflavin deficiency  <response>: REF : LIPINCOTT 