Forms: Let answers disappear after they have been chosen

Could it be possible to make the form work as a question with a list of "answers" but as the answer have been chosen once it cannot be chosen again.. I'm thinking say you have a list of times or dates for meetings eg. parents-teacher interviews where each student get to choose a time, when one time has been chosen, it will then disappear from the list?? It would be great if this could be done in forms! Brilliant even! :)