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': "A clinical specimen was obtained from the wound of a patient diagnosed as Nocardiosis. For the selective isolation of Nocardia sp. Which one of the following would be the best method - \nSelect and explain. \nA. Paraffin bait technique, B. Castaneda's culture method, C. Craige's tube method, D. Hair bait technique", 'role': 'user'}, {'content': 'Answer: A \nExplanation: ‘Since Nocardia are among the few aerobic microorganisms that use paraffin as a carbon source, paraffin baiting can be used to isolate\xa0the organisms from mixed cultures’.', 'role': 'assistant'}]