The mode of arrangement of sepal or petals in a floral bud with respect to other members of same whorl is known as :-AestivationPlacentation Cohesion Adhesion

The mode of arrangement of sepals or petals in a floral bud with respect to other members of the same whorl is known as Aestivation.

Aestivation refers to the way in which the petals or sepals are arranged in a flower bud. There are different types of aestivation, such as twisted, valvate, imbricate, and engaging, depending on how the floral parts overlap or are arranged relative to one another before blooming.

• Placentation refers to the arrangement of ovules within the ovary.
• Cohesion indicates the joining together of similar parts, like petals or sepals.
• Adhesion refers to the joining of different parts.

Thus, the correct answer to the question is Aestivation.