Which part of the leaf is meant for photosynthesis and gaseous exchange?
Bundle sheath with chloroplasts
Bundle sheath extensions
Palisade parenchyma
Spongy parenchyma
Spongy parenchyma is present below the palisade and has chloroplasts. Intercellular spaces are connected to the substomatal cavity and hence to stomata which help in gaseous exchange. Hence, the correct answer is option d.