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': 'Culture mediam for corynebacterium diphtheria? \nSelect and explain. \nA. Loefflers serum slope, B. McConkey, C. Saburauds agar, D. Lowenstein Jensen medium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Loefflers serum slope", 'role': 'assistant'}]