The correct option is A A - Racemose, B - Cymose
In the racemose type of inflorescence, the peduncle never ends in a flower, but it continues to grow indefinitely and bears flowers laterally in acropetal succession i.e., the younger flowers develop towards growing end while the older flowers grow at the base.
In cymose inflorescence, the growth of peduncle is limited as it ends in a flower and the subsequent lateral axis also ends in a flower. Further, flowers are borne in basipetal succession i.e., the older flowers are towards apex and younger towards base.
In the above image A represents a racemose type inflorescence while B represents a cymose type inflorescence.