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': 'ELISA is: \nSelect and explain. \nA. A name of a scientist, B. A radiologic procedure, C. A pioneer in dentistry, D. An enzymatic immune reaction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]