The correct option is D Sclerenchyma tissues are unevenly thickened
In parenchymatous tissues, cells have intercellular spaces and thin cellulose walls. They are present in soft plant parts and help in storage.
Collenchymatous tissues have no or very less intercellular spaces. Their walls are thickened at corners due to deposition of cellulose and pectin. They are the living mechanical tissue and they provide flexibility to the plants.
While in sclerenchymatous tissues, cells are compactly arranged. Their cell walls are thickend due to unifrom deposition of the lignin. And they provide mechanical strength to the plants.