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': "For early diagnosis of corynebacteria diphtheria medium used is \nSelect and explain. \nA. Potassium tellurite agar, B. Loeffler's serum slope, C. Hoyle's media, D. Tinsdale", 'role': 'user'}, {'content': 'Answer: B \nExplanation: For early diagnosis - LSS (6-8hours).\nFor defenitive diagnosis - Potassium tellurite agar.', 'role': 'assistant'}]