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': 'Which is the common feature of spirillary rat bite fever \nSelect and explain. \nA. Lymphadenopathy, B. Endocarditis, C. Hepatosplenomegly, D. Amegakaryocytic thrombocytopenia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Rat bite fever caused by different bacteria (1)streptobacillus moniliformis (2)spirillum minus both of which are natural parasites of rodents.spirillary RBF have incubation period of 1_4 weeks.rat bite wound which may have healed suppurates at the onset of fever with regional lymphadenopathy Ref:Anantnarayan and paniker's microbiology 10th edition", 'role': 'assistant'}]