The correct option is B Twisted
Hibiscus belongs to family Malvaceae. Its flower contains five, free, petals.
In valvate aestivation, sepals or petals are present in a whorl and just touch one another at margin without overlapping.
In imbricate aestivation, margins of sepals and petals overlaps one another but not in any particular fashion.
Vexillary aestivation is the arrangement of corolla in which the anterior petal is innermost and posterior petal is outermost and largest.
In twisted aestivation, margin of one appendage overlaps the next one and so on. This kind of arrangement of petals is observed in flower of Hibiscus.
Therefore, the correct answer is option B.