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': 'Active artificial immunization is induced by the administration of all of the Following EXCEPT \nSelect and explain. \nA. Bacterial products, B. Toxoids, C. Vaccines, D. Antitoxins', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]