Agglutination of chromosomes is caused by a mitotic poison called

Compare the statements $A$ and $B$.
$Statement A$: Synthesis of $DNA$ takes place in the $S$-phase of interphase.
$Statement B$: Every chromosome,during metaphase,has two chromatids.
Choose the correct description.

Identify the following figures $(A-D)$ and choose the correct option.

Coiling of chromatids in mitotic and meiotic division is

$A$: Multicellular organisms begin their life from a single cell.
$R$: All somatic cells of a multicellular organism have the same number of chromosomes.

Based on the figures given below,select the option that shows the correct sequence of cell division.