This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Megaloblastic Anemia, Subject name: Pathology
[{'content': 'Which of the following are the features of pernicious anemia? \nSelect and explain. \nA. Hyper-segmented neutrophils, B. Subacute combined degeneration of spinal cord, C. Gastric mucosal atrophy, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Features of pernicious anemia: Hyper-segmented neutrophils Howell-Jolly bodies Megaloblasts Macro-ovalocytosis Ataxia, Subacute combined degeneration of spinal cord Increase levels of methyl malonyl CoA, homocysteine', 'role': 'assistant'}]