This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Maximum sterilizing action is shown by which anti TB drug 
Select and explain. 
A. Rifamipicin, B. INH, C. Pyrazinamide, D. Streptomycin
C: Pyrazinamide
Answer: C: Pyrazinamide 
Explanation: Refer Katzung 13th/819 Pyrizanimde is most effective against slow growing bacteria inside macrophages Thus it possesses strong sterilizing activity