This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Antitubercular drug which reaches inside the caseous material is ? 
Select and explain. 
A. Isoniazid, B. Rifampicin, C. Pyrazinamide, D. Ethambutol
B: Rifampicin
Answer: B: Rifampicin 
Explanation: None