In Kranz anatomy, the bundle sheath cells have:
Thin walls, many intercellular spaces and no chloroplasts.
Thick walls, no intercellular spaces and a large number of chloroplasts.
Thin walls, no intercellular spaces and several chloroplasts.
Thick walls, many intercellular spaces and few chloroplasts.

Kranz anatomy occurs in the chloroplast of C4 plants such as sugarcane, maize (Zea mays), sorghum etc. It has two types of photosynthetic cells arranged in a specific manner. These are bundle sheath cells that surround the vascular centres, and mesophyll cells that, in turn, surround the bundle sheath cells. Rubisco is localised only within internalised bundle sheath cells which helps in fixation of carbon dioxide. The bundle sheath cells have thick walls, no intercellular spaces and a large number of chloroplasts. So, the correct answer is option B.