Which element is required for the formation of the bipolar spindle during cell division?

Which of the following is true for a syncytium?

$A$ somatic cell that has just completed the $S$ phase of its cell cycle,as compared to a gamete of the same species,has:

$A$: In telophase,the two daughter nuclei formed at opposite poles contain the same number of chromosomes as the parent nucleus.
$R$: In anaphase,the centromere of each chromosome splits,allowing the sister chromatids to separate.

The best stages to study the morphology and shape of a chromosome are respectively:

What is a syncytium?