AP1232 /AP 1231

AP 1230 series has 8 antennas but how any antennas are used by G radio and 2 other A radio?

if remember correctly it was 2 antenna for - G radio and 3 each Antenna for "A" radios.

Can anyone confirm

dual 5 GHz 802.11ac 4×4:4 MU-MIMO and 2.4 GHz 802.11n 4×4:4 MIMO
then 4 antennas dual + 4 antennas 5GHz only