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: Pathology
case his peripheral smear is showing hypessegmented neutrophils dye deficiency of 
Select and explain. 
A. vit B12 deficiency, B. Folate deficiency, C. Iron defficiency, D. Thalasemia
A: vit B12 deficiency
Answer: A: vit B12 deficiency 
Explanation: ref : robbins 10th ed