The correct option is B 1-b, 2-c , 3-a
Natural propagation takes place through various plant parts, such as, leaves, stems and roots. Potato is a stem tuber and the eyes of the tubers help in vegetative propogation. In ginger, the nodes of rhizome help in vegetative propogation whereas, in case of Bryophyllum, new plantlets arise from the edges and notches of leaves when they come in the contact of soil.