Interferons are the protein molecules produced from the

The correct option is A Infected host cells

• Interferon is the proteins that are released by the host cells in response to the attack of the virus.
• These are categorised as signal proteins. These have the tendency to interfere with the viral replicative cycle and stop their proliferation.
• This alarm the nearby cells to enhance their anti-viral defenses.

So, the correct answer is option B.