The right answer is Exocytosis.
In a eukaryotic cell, exocytosis is a mechanism of material release by invagination of the cytoplasmic membrane. It consists of a spillage of the products of a vesicle outside the cell, by fusion of the plasma membrane with the membrane of this vesicle.
Its opposite (or reverse) is endocytosis. In the case of a vacuole, see the exocytosis vacuole.
