Synapsis occurs in the Zygotene subphase with bivalent formation, which is correct. Terminalization occurs in Diakinesis, aligning chromosomes for division, which is a characteristic feature, though division itself happens later. Replication (S-phase) and crossing over (Pachytene) do not match Diplotene or other listed features correctly. Thus, I and IV are the best match based on the table.