The correct option is A Acropetal order
Acropetal order- it’s a modified form of racemose inflorescence. In this new flowers and new buds are at the apex whereas relatively older flowers and buds are at the base.
Centrifugal order- its arrangement of flowers in cymose head i.e. old flowers are the centre and younger flowers are at periphery.
Centripetal order-its arrangement of flowers in racemose inflorescence in which young flowers are at centre and older are at periphery.
Basipetal order-it’s a modified form of cymose inflorescence. In this new flowers are placed at bottom and relatively older flowers are at apex.
In racemose, flowers are arranged in Acropetal succession. Plant organs can grow according to two different schemes, namely monopodial or racemose and sympodial or cymose.
In inflorescences these two different growth patterns are called as indeterminate and determinate respectively and indicate whether a terminal flower is formed and where flowering starts within the inflorescence. In Monopodial or racemose growth the terminal bud keeps growing and forming lateral flowers. A terminal flower is never formed.
Therefore, the correct answer is option A.