The correct option is C thin-walled
Parenchyma forms the major component within plant organs. The cells of the parenchyma are generally isodiametric. They may be spherical, oval, round, polygonal or elongated in shape. Their walls are thin and made up of cellulose. They may either be closely packed or have small intercellular spaces. The parenchyma performs various functions like photosynthesis, storage of food, etc.
Sclerenchyma tissues are made up of thick walled and dead cells.