Lysosomes are single unit membrane-enclosed microbodies which consist of a wide variety of hydrolytic enzymes. Lysosomes show polymorphism and are of various types. They are as follows-
Primary lysosomes are newly formed lysosomes, also called as proto-lysosomes. When the primary lysosomes fused with phagosomes and food vacuoles, called heterophagosomes, a type of secondary lysosomes.
Hence, the correct answer is 'Secondary lysosome'.