Radio button break down by categories

Radio button break down by categories

I have a question about radio button. For instance,

Group A

  • item 1
  • item 2
  • item 3
  • item 4
Group B
  • item 5
  • item 6
  • item 7
  • item 8

Is there any way to select ONE answer from either Group A or Group B not both?

OR how do we break down radio listing and insert label Group B in the middle?

Thank you for your help,

woodpecker04