Which of the following is a mitotic poison?

Select the incorrect statement from the following.

Match the following:

Column-$I$	Column-$II$
$(1)$ $G_2$ phase	$(p)$ Quiescent stage
$(2)$ Centriole duplicates	$(q)$ Protein are synthesized
$(3)$ Cell cycle	$(r)$ $S$ phase
$(4)$ Heart cells	$(s)$ Growth and division

While examining the mitotic stage in a tissue,one finds some cells with $16$ chromosomes and some with $32$ chromosomes. What possible reasons could you assign to this difference in chromosome number? Do you think cells with $16$ chromosomes could have arisen from cells with $32$ chromosomes or vice versa?

Which of the following is true for a syncytium?

Which processes are induced during the cell cycle?