Establish conditional relationships in a PDF Document

I have a pdf document that I need conditional relationships built into. For example if this check box is clicked this text field must be filled out. or If an item from this Drop down list is selected a specific text box must be filled out. There is also so conditional required fields that need to be created. For instance there is a section of the form that has 4 check boxes, a check box must be clicked (required), but only one can be clicked. This is a single pdf document.