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': 'The following phenomenon is responsible for antibiotic resistance in bacteria due to slime production- \nSelect and explain. \nA. Co-aggregation, B. Biofilm formation, C. Mutation evolving in altered target site for antibiotics, D. Mutation evolving a target bypass mechanism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]