The correct option is D Packaging of materials to be delivered inside or outside the cell
Golgi apparatus is an organelle found in the eukaryotic cells which forms a complex of vesicles and folded membranes within the cytoplasm. Its main function is sorting, modifying and packaging of proteins. It is involved in the secretion, glycosylation of proteins and lipids and helps in intracellular transport.
The Golgi apparatus semicircular membrane bound sacs or folds (5-8 in number) called cisternae (with ribosome molecule) which are called the functional units of the organelle.