The correct option is A Leaves
Kranz anatomy is found in leaves of C4 plants. The C4 pathway requires the presence of two types of cells i.e., mesophyll cells and bundle sheath cells. The particularly large cells around the vascular bundles of C4 plants are called bundle sheath cells, these cells may form several layers around the vascular bundles, they are characterized by having a large number of chloroplasts, grana are absent, thick walls impervious to gaseous exchange and no extracellular spaces. This special anatomy of leaves of the C4 plants is called Kranz anatomy. 'Kranz' means wreath and is a reflection of the arrangement of cells.