RadioButtons gruppieren?

[LoL]

Delphi-Quellcode:

procedure TForm1.rb_onClick(Sender: TObject);<---rb_on und rb_off klick
begin
  if sender = rb_on then
    rb_off.Checked := false
  else
    rb_on.Checked := false
end;

procedure TForm1.rb_jpegClick(Sender: TObject);<---rb_jpeg und rb_bmp klick
begin
  if sender = rb_bmp then
    rb_jpeg.Checked := false
  else
    rb_bmp.Checked := false
end;