The correct option is D Cell plate formation
Mitosis includes karyokinesis (division of nucleus) followed by cytokinesis (division of cytoplasm).
During division of cytoplasm (cytokinesis), there is cell plate formation in plants. Cell plate is a structure that forms in a dividing plant cell at the end of mitosis. It is derived from the Golgi complex. Cell plate forms into the middle lamella. It helps to divide the parent cell into two daughter cells.
Replication of DNA occurs during the S phase of interphase where the DNA makes a complimentary copy of itself.
Prophase is the first phase of mitosis during which condensation of chromatin leads to formation of chromosomes. The nuclear envelope also disappears during prophase.
Replication of DNA, condensation of chromatin and disappearance of nuclear envelope occur before karyokinesis.