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
[{'content': 'Rifampicin acts by inhibiting : \nSelect and explain. \nA. DNA Dependent RNA polymerase, B. RNA dependent DNA polymerase, C. Mycolic acid inhibition, D. Mycolic acid incorporation defects', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]