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
Which one of the following is the most likely diagnosis? 
Select and explain. 
A. Meningococcal meningitis, B. Subarachnoid haemorrhage, C. Cryptococcal meningitis, D. Tuberculous meningitis
D: Tuberculous meningitis
Answer: D: Tuberculous meningitis 
Explanation: 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 2345