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
Active artificial immunization is induced by the administration of all of the Following EXCEPT 
Select and explain. 
A. Bacterial products, B. Toxoids, C. Vaccines, D. Antitoxins
D: Antitoxins
Answer: D: Antitoxins 
Explanation: None