In meiosis,the centromere divides during

When synapsis is complete all along the chromosome,the cell is said to have entered a stage called

Match the stages of meiosis in Column $I$ to their characteristic features in Column $II$ and select the correct option using the codes given below.

Column $I$	Column $II$
$A$. Diakinesis	$1$. Crossing over takes place
$B$. Pachytene	$2$. Terminalisation of chiasmata
$C$. Zygotene	$3$. Chromosomes align at equatorial plate
$D$. Metaphase	$4$. Pairing of homologous chromosomes

Codes:
$A \quad B \quad C \quad D$

$A$: In the diplotene sub-stage,the two chromosomes of a homologous pair move away from each other.
$R$: The connection is maintained at the site where crossing over has occurred in homologous chromosomes.

Meiosis occurs in which of the following cells?

..................... marks the site where crossing over has occurred.