Ans.
Cell cycle can be defined as a series of events, which leads to duplication of a cell's genetic material and division of cytoplasm along with other organelles to make two new daughter cells.
It is divided into interphase and M phase (mitosis). Interphase consists G1 (gap) phase, S (synthesis) phase, and G2 phase and M phase includes karyokinenesis and cytokinesis.
During S phase of interphase, the parent DNA molecule duplicates to make a copy of itself. It allows formation of daughter cells having same genetic makeup as parent. Thus, option). interphase correctly matches with 'the DNA replicates.'
Karyokinesis phase of mitosis includes division of parent cell nucleus to make two nuclei with same genetic makeup, which are further transferred to resulting daughter cells. Thus, option). mitosis correctly matches with 'the nucleus divides.'
Cytokinesis involves division of cell cytoplasm at the end of mitosis, which leads to separation of parent cell into two daughter cells. Thus, option). cytokinesis correctly matches with 'the cytoplasm divides.'