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 is obtained from - \nSelect and explain. \nA. Sea fish, B. Plant, C. Leaves, D. Bacteria', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., Bacteria Rifampin is a semisynthetic derivative of rifamycin, an antibiotic produced by Streptomyces mediterranei.", 'role': 'assistant'}]