This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Adenosine deaminase In CSF Is significantly higher In \nSelect and explain. \nA. Tuberculous meningitis, B. BacteriaI meningitis, C. Viral meningitis, D. Syphilitic meningitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tuberculous meningitis (TBM) is the most common form of central nervous system tuberculosis (TB) and has very high morbidity and moality. TBM is typically a subacute disease with symptoms that may persist for weeks before diagnosis Ref Harrison20th edition pg 2456', 'role': 'assistant'}]