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Yes, you can use the drop down choice/list on conditional logic. Here's a guide that you can refer to: http://www.jotform.com/help/57-Smart-Forms-Using-Conditional-Logic.
Perhaps you can tell us how you would like to set it up. Here's a sample form with a drop down field that has a condition on it: https://form.jotform.com/53061879753970?.
Here's how my conditions are setup on it:
I hope that helps.