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': 'The following is NOT a component of innate immunity - \nSelect and explain. \nA. Epithelial surfaces, B. Antibody, C. Lysozyme, D. Sebum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anatomical barriers include physical, chemical and biological barriers. The epithelial surfaces skin& mucous membrane, Mucus, saliva, lysozyme,Tears,flushing action of urine etc.. Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg.no. : 79-81', 'role': 'assistant'}]