The answer is C. Yeast doesn't have a cell wall. The onion skin cell has a cell wall.
Through the process of elimination.
A. Both yeast and the onion skin cell have a membrane-bound nucleus since both yeast and onion are eukaryotes.
B. Both have a cell membrane, there are no cells without cell membranes.
C. CORRECT
D. Yeast doesn't have chloroplast since it belongs to fungi, while the onion, as a plant, must have chloroplast.