[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.) [Control Type] 
Radio button group
T e x t i n p u t ( i n c l u d i n g d a t e / t i m e a n d p a s s w o r d f i e l d s )
C h e c k b o x
R a d i o b u t t o n g r o u p
C o m b o b o x
L i s t b o x
B u t t o n