This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
The drug which has highest CSF penetration among anti TB drugs? 
Select and explain. 
A. INH, B. Rifampicin, C. Ethambutol, D. Streptomycin
A: INH
Answer: A: INH 
Explanation: Among the anti TB drugs used, INH has highest CSF penetrationRef: Harrison 19th / Page 205