3d0f7949_ents___Techniques_for_WCAG_2_0__LiveCycle_Placement_Rules
[Control Type] Radio button group [LiveCycle Placement Rules] 
Default placement for the label for each individual radio button is to the right of the button. Create a visible caption for the radio button group by creating static text and placing it to the left of or above the group. (See Labeling radio buttons below.)
PDF10: Providing labels for interactive form controls in PDF documents | Techniques for WCAG 2.0