The correct option is D Bamboo - grafting
Runner is a modified stem which grows horizontally forward creeping on ground and producing roots at nodes. Common example of plants producing runners are grasses like Cynodon, Oxalis etc.
Grafting is a method of artificial vegetative propagation. It is usually practiced in dicots (like rose, mango etc) and cannot be done in monocots (like sugarcane, bamboo, banana etc) because in monocots vascular cambium is absent.
Adventive embryony is a type of agamospermy in which the gametophytic generation is completely eliminated. The zygotic embryo either degenerates or competes with apomictic embryos. Adventive embryony usually leads to the formation of more than one embryo in a seed. Well known examples of adventive embryony are citrus, cactaceae, euphorbiaceae, orchidaceae etc.