Correct Answer
Optical Mark Recognition
<b>Correct answer: D</b> β Optical Mark Recognition <ul> <li><b>Concept:</b> OMR uses optical sensors to detect darkened bubbles on a sheet when light reflects differently. It converts marks into data for scoring.</li> <li><b>Why others are wrong:</b> <ul> <li>A: Optical Mark Response is not the standard term.</li> <li>B & C: No magnetic component is involved in OMR.</li> </ul></li> <li><b>Exam tip:</b> Fill bubbles completely and avoid stray marks to ensure accurate recognition.</li> </ul>