Which of the following is not a part of mitosis?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Attachment site of spindle fibers	$(P)$ Cell cycle
$(2)$ Pairing of homologous chromosomes	$(Q)$ Kinetochores
$(3)$ Exchange of genes	$(R)$ Synapsis
$(4)$ Interval between two successive cell divisions	$(S)$ Crossing over

Which stain is commonly used for the study of cell division?

Select the correct option for the following matches:

List-$I$	List-$II$
$(1)$ Metaphase-$I$	$(a)$ Number of chromosomes becomes half of the parent cell
$(2)$ Anaphase-$I$	$(b)$ Each chromosome splits at the centromere to form chromatids
$(3)$ Anaphase-$II$	$(c)$ Homologous chromosomes form pairs at the equatorial plate
$(4)$ Telophase-$II$	$(d)$ Homologous chromosomes move towards opposite poles

Given below are two statements:
Statement $I$: During $G_0$ phase of cell cycle,the cell is metabolically inactive.
Statement $II$: The centrosome undergoes duplication during $S$ phase of interphase.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following statements is incorrect?