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: Microbiology
[{'content': 'Tetanospasmin encoding genes are locaed on: \nSelect and explain. \nA. Chromosome, B. Plasmid, C. Both, D. Transposon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is. b. Plasmid', 'role': 'assistant'}]