Distractor (noun)
alternative spelling of distracter
Distracter (noun)
That which distracts, or serves as a distraction.
“distractee”
Distracter (noun)
Any of the incorrect answers in a multiple-choice question.
Wiktionary
Distractor (noun)
a person or thing that distracts
“the visual channel is capable of being a powerful distractor”
Distractor (noun)
an incorrect option in a multiple choice question
“four pictures, three of which are distractors”
Oxford Dictionary