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': 'Anti-tubercular drug susceptibility can be done by all of the following methods, except ? \nSelect and explain. \nA. Resistance ratio method, B. Disc diffusion method, C. Molecular method, D. Radiometric broth method', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Disc diffusion method", 'role': 'assistant'}]