This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Transcription is inhibited by \nSelect and explain. \nA. Actinomycin D, B. Amanitin, C. Chloramphenicol, D. Streptomycin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Clindamycin -D antibiotics from StreptomycesMode of action is by inseion of phenoxa-zone ring between two G-C bp of DNA USed as anti-cancer drugRef: DM Vasudevan, 7th edition, page no: 593 table 45.2', 'role': 'assistant'}]