The correct option is D Raunkiaer
Christen C Raumniker's classification (1904) recognized life forms (first called "biological types") on the basis of plant adaptation to survive the unfavorable season, be it cold or dry, that is the position of perennating buds with respect to the soil surface. In subsequent works, he showed the correspondence between gross climate (various climatic variables including temperature) and the relative abundance of his life-forms