This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, 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 an altered target site for antibiotics, D. Mutation evolving a target bypass mechanism', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Biofilm formationRef. Greenwood1 s Medical Microbiology, 16th/ep 16, 38, 86Slime is an amorphous, viscid colloidal material that is secreted extracellularly by some bacteria (e.g. Staph epidermidis). The slime remains around the bacteria and provides a matrix in which biofilm formation can take place.In biofilm formation the bacterial colony is spread very thinly (300-400Nm thick) for e.g. formation of biofilms on catheters and prosthetic devices.This biofilm formation in the slime provides antibiotic resistance by restricting access of drugs to the bacterium.", 'role': 'assistant'}]