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
All of the following are pa of the innate immunity except - 
Select and explain. 
A. Complement, B. NK cells, C. Macrophages, D. T cells
D: T cells
Answer: D: T cells 
Explanation: Natural killer cells (NK cells) are a component of the innate immune system that does not directly attack invading microbes. Other components are mast cells, eosinophils, basophils; and the phagocytic cells including macrophages, neutrophils,complement cascade and dendritic cells. Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg.no. : 78-81