This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'The scientist below contributed to all of the following except \nSelect and explain. \nA. Chicken Cholera vaccine, B. Rabies vaccine, C. Diphtheria toxoid, D. Anthrax vaccine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lois Pasteur (1822-95):*He introduced techniques of sterilization and developed the steam sterilization, hot air oven, and autoclave*He worked on Chicken cholera vaccine, rabies vaccine, and Anthrax vaccine.Diphtheria toxoid work was done by Roux and Yersin.Ref: Ananthanarayan 9th edition, p13', 'role': 'assistant'}]