Multiple choice general knowledge science & technology RADAR Rays Detection and Raging Rays Detection and Ranging Radio Detection and Ranging Radar Defection and Ranging Reveal answer Fill a bubble to check yourself C Correct answer Explanation RADAR is an acronym for Radio Detection and Ranging, which uses radio waves to detect and locate objects. Options A and B incorrectly say 'Rays' instead of 'Radio', while D has a typo saying 'Defection'.