. Which of the following tissues has dead cells
D: Epithelial tissue
Cellulosic cell walls are thin in parenchyma cells. Collenchyma cells have thicker cellulose walls and pectin deposition in the corners.
Sclerenchyma cells have thick lignified cell walls, are dead at maturity, and protect various sections of the body. Epithelial cells have thin walls and are alive.
Hence, Option (B) is correct. i.e Sclerenchyma