The enzyme recombinase is required at which stage of meiosis?

Match the following stages of Prophase-$I$ of meiosis with their respective characteristics:

$I$. Leptotene	$A$. Chromosomes appear as clear bivalents/tetrads
$II$. Zygotene	$B$. Chromosomes appear like a thread (beaded appearance)
$III$. Pachytene	$C$. Chromosome condensation reaches its maximum
$IV$. Diakinesis	$D$. Synapsis of homologous chromosomes occurs

Select the correct option for a chromosome in Anaphase-$II$ regarding the number of centromeres,chromatids,and kinetochores.

In meiosis,the number of chromosomes is .....

Arrange the following events of meiosis in the correct sequence:
$(i)$ Crossing over
$(ii)$ Synapsis
$(iii)$ Terminalisation of chiasmata
$(iv)$ Disappearance of nucleolus

Identify the stage of meiosis characterized by the following features:
- Marked by terminalisation of chiasmata.
- Chromosomes are fully condensed.
- By the end of this stage,the nucleolus disappears.