Indicate Whether Each of the Following Processes Is Topologically Similar

Short Answer

Indicate whether each of the following processes is topologically similar (Y) or not similar (N) to formation of intralumenal vesicles in multivesicular bodies. Your answer would be a four-letter string composed of letters Y and N only, e.g. YYYY.
( ) Fission of peroxisomes
( ) Formation of clathrin-coated vesicles
( ) Budding of HIV from infected cells
( ) Cytokinesis