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
The following is NOT a component of innate immunity - 
Select and explain. 
A. Epithelial surfaces, B. Antibody, C. Lysozyme, D. Sebum
B: Antibody
Answer: B: Antibody 
Explanation: 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