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': 'Antibiotic sensitivity and resistance of micro organisms is determined by \nSelect and explain. \nA. Direct microscopy, B. Culture, C. ELISA, D. DNA probe', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]