In an inflorescence where flowers are borne laterally in an acropetal succession, the position of the youngest floral bud in the floral axis shall be

Distal

Explanation:

Such type of inflorescence is called racemose type inflorescence. In such type of inflorescence, the flowers are borne laterally in acropetal succession which means the oldest flower is near the base and newest flower is present at the apex or distal. In this type of inflorescence, the growth of floral axis is unlimited.