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': 'Which of the following is an essential medium ? \nSelect and explain. \nA. MacConkey agar, B. Nutrient agar, C. Deoxycholate citrate agar, D. Selenite F broth', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Nutreint agar A minimum essential medium is a culture medium whereupon most bacteria can grow. Examples is Nutrient agar.", 'role': 'assistant'}]