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: Anatomy
[{'content': 'Serious infections can occur when absolute neutrophil count decreases below \nSelect and explain. \nA. <500/microliter, B. <800/microliter, C. <1000/microlitre, D. <2000/microliter', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]