The standard measure word for any exam question is
道 (dào), not
个 —
一道选择题 ('one multi-choice question').
选择 ('to choose') +
题 ('question/problem') = 'choosing-question'. Same -
题 suffix builds
填空题 (fill-in-the-blank),
判断题 (true/false),
问答题 (short-answer).