The correct answer is D. Einstein : Television.
Mulder is a scientist who discovered proteins. Curie is a scientist who discovered radium. Becquerel is a scientist who discovered radioactivity. Einstein is a scientist who developed the theory of relativity. Television is a device that allows people to watch moving images.
The relationship between Mulder and proteins is that Mulder discovered proteins. The relationship between Curie and radium is that Curie discovered radium. The relationship between Becquerel and radioactivity is that Becquerel discovered radioactivity. However, the relationship between Einstein and television is not that Einstein discovered television. Einstein developed the theory of relativity, which is a theory of gravity. Television is a device that allows people to watch moving images. Therefore, the relationship between Einstein and television is different from the relationships between Mulder, Curie, and Becquerel and their respective discoveries.