The correct option is C Sorghum
The leaf is dicot and dorsiventral due to the presence of differentiated mesophyll cells into palisade and spongy parenchyma. Gram, soyabean and mustard are dicot plants.
The leaves of monocot do not contain palisade parenchyma because the mesophyll of monocot leaf is not differentiated into palisade and spongy parenchyma, all being thin walled, chlorophyllous and irregularly compactly arranged with fewer intercellular spaces. Sorghum (family-Poaceae) is a monocot plant.