The correct option is D Measles
Interferons are a group of signalling molecules made and released by host cells in response to the presence of pathogens. In a typical scenario, a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defences.
Of the given options, measles is the only disease, which is caused by a virus. While typhoid and tetanus are caused by bacteria (Salmonella typhi and Clostridium tetani respectively) and malaria is a mosquito-borne disease, caused by protozoa. So, the correct answer is option C.