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I'm sorry, but I'm not quite sure if I understand the question. You mean to say that, when "Leaflets" option is selected, you only want the other fields under leaflets to be available and disable or hide the others? If so, you can do that using our show/hide conditional logic.
Check this guide on how to set show/hide condition to your form: http://www.jotform.com/help/196-Hide-or-Show-Multiple-Fields-at-Once.
If not, please kindly explain further.