This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
False about innate immunnity 
Select and explain. 
A. Immune response occurs in minutes, B. Immunological memory responses are absent, C. Depends on species, Race, individual, D. Prior exposure to antigen is required
D: Prior exposure to antigen is required
Answer: D: Prior exposure to antigen is required 
Explanation: Prior exposure to antigen is not required.