The correct option is B Solid style
The cylindrical transmitting tissue is located in the centre of the solid style and is continuous with the papillae. These cells appear roundish in transverse sections and elongated in longitudinal sections. They are connected with each other by plasmodesmata present both in the transverse and longitudinal walls. The transmitting tissue shows two types of cells: one type shows cytoplasm rich in mitochondria, active dictyosomes, RER, ribosomes mostly aggregated in polysomes, plastids containing one or two starch grains, and lipid droplets.