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
True about interferon is - 
Select and explain. 
A. Host protein, B. Viral protein, C. Inactivated by nucleases, D. Virus specific
A: Host protein
Answer: A: Host protein 
Explanation: Interferon are host coded proteins that are produced on induction by viral or non-viral inducers.