Assertion: Corolla of bean shows vexillary aestivation.
Reason: Two of the petals of corolla are fused and protect the androecium and gynoecium.
In valvate aestivation, the sepals or petals of a whorl touch one another at the margins but not overlapped. ex: calyx and corolla of Calotropis, calyx of pea and bean, calyx and corolla of makoi.