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
The antitubercular drug which impacts red colouration to urine is: 
Select and explain. 
A. 1NH, B. Pyrazinamide, C. Rifampicin, D. Ethambutol
C: Rifampicin
Answer: C: Rifampicin 
Explanation: Rifampicin