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
True about interferon - 
Select and explain. 
A. It is virus specific, B. It is Bacteria specific, C. Produced from Bacteria, D. Effective against viral infection
D: Effective against viral infection
Answer: D: Effective against viral infection 
Explanation: a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defenses. Reff: Anantharayan & Panikers textbook f microbiology 9th edition pg:155