The correct answer is option B-contains mostly cellulose; forms the outer layer of animal cells.
The cellulose is the component, which make up the cell wall of the plant cells. the cell wall is absent in the case of the animal cells. Other than plants, some fungus also have cell wall, but the cell wall made up of cellulose is an unique feature of the plant cells. The cell wall is absent in the animal cell, so, cellulose would not be find in animal cell but it would be present in plant cell.