If this is a quiz question, then we have to somehow get into the mind of a complete and utter idiot who thinks they can set quizzes despite having not the slightest notion of how to go about it or indeed any concept of basic research. I think the most likely candidates for such a useless moron to demand as the "correct" answers would be Unchained Melody, Bohemian Rhapsody and Space Oddity - the first two of these are almost 100% certain to be in the selection, and Space Oddity is the most likely third candidate.