This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Ehrlichia effects \nSelect and explain. \nA. Endothelial cell, B. Neutrophils, C. RBC, D. Macrophages', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ehrlichia are small gram negative,obligate intrcintracellular bacteria which have affinity towards bloodcells.Ehrichia chaffeensis cause human monocyte ehrlichiosis and E.phagocytophilia cause human granulocytic ehrlichiosis which effects granulocytes (neutrophils) Ref:ananthnarayan and paniker's microbiology 10th edition", 'role': 'assistant'}]