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': 'Selective medium for shigella ? \nSelect and explain. \nA. Chocolate agar, B. BYCE medium, C. Hektoen agar, D. EMJH medium', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Hektoen agar", 'role': 'assistant'}]