This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Vaccination is based on the principle of - \nSelect and explain. \nA. Agglunation, B. Phagocytosis, C. Immunologic Memory, D. Clonal Detection', 'role': 'user'}, {'content': "Answer: C \nExplanation: Vaccination is aificial active immunity. Active immunity is associated with immunological memory. It is produced actively by host's immune system. Reference : Anathanarayan & paniker's 9th edition, pg no:82,83 <\\p>", 'role': 'assistant'}]