Answer:
The correct answer will be option B (Interferons).
Step-by-step explanation:
The innate immune response to viral infection begins with the recognition of pathogen which starts viral host response in organism.
After detection of viral infection cell produces type I interferon's, the protein molecule which interfere with the proliferation of viral cells.
Interferon's provide resistance to viral infection by :
1. Binding to IFN-α/β receptors which activate JAK/STAT pathway.
2. Production of enzymes which leads to the degradation of viral RNA.
3. Induction of ds-RNA-dependent kinase which inactivates the synthesis of proteins.
4. Binding to Natural killer cells which induces lytic activity, killing viral infected cells.
Thus, option B-interferon is the correct answer.