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': 'Example of selective medium is: \nSelect and explain. \nA. LJ medium, B. Blood agar, C. Selenite F broth, D. Chocolate agar', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is. 'a' i. e., LJ medium", 'role': 'assistant'}]