In an MCQ, the correct option is known as the:

In exam and item-writing terminology, a multiple-choice question uses three distinct technical terms: the option that satisfies the question is the 'answer' (or 'key'); the deliberately wrong options placed beside it are the 'distractors'; and whatever a test-taker selects, right or wrong, is simply their 'response'.

So the option that is correct in an MCQ is specifically called the 'Answer' — examiners and item-writers reserve this label for the one choice that satisfies the question, not for any incorrect option.

• Response — names the test-taker's selection, correct or incorrect; it does not single out the right one.

• Distractors — name the incorrect options included by design, the opposite role to the correct choice.

• None of these — would only be the right choice if the required term were missing from every option listed.

Hence 'Answer' is the correct term for the correct option in an MCQ.