Given is the ultrastructure of an animal cell. Identify the parts marked as $A, B, C$ and $D$.
A B C D
(a) Plasma Nucleus Mitochondrion Golgi membrane complex
(b) Plasma Vacuole Mitochondrion Golgi membrane complex
(c) Cell wall Nucleus Mitochondrion RER
(d) Cell wall Vacuole Chloroplast Golgi complex