can I bring my question paper outside after finishing the neet exam or I should throw the question paper in dustbin.??

Hi , as per your query I would like to tell you that yes you can bring your question paper with you after giving exam . They take your omr sheet only and question paper is all yours so that you can tally your answers and get an insight of how much marks you can score in your exam . There are various institutes like aakash and Allen who post answers of your questions paper as well .
Hope this helps