Correct Answer - a
Sorghum (family - Poaceae) is a monocot plant. The leaves of monocot do not contain palisade parenchyma because the mesoohyll of monocot leaf is not differentiated into palisade and spongy parenchyma , all being thin walled , chlorophyllous and irregularly compactly arranged with fewer intercellular spaces.
Palisade cells occur in dicotyiedonous plants and also in the net - veined monocots , the Araceae and Dioscoreaceae.
