In which stage of meiosis does the enzyme recombinase play a role?

What is the exchange of chromosomal segments between maternal and paternal chromosomes during meiosis called?

Match the following columns:

Column $I$	Column $II$
$(a)$ Prophase-$I$	$(p)$ Nucleolus and nuclear membrane reappear
$(b)$ Metaphase-$I$	$(q)$ Longest phase
$(c)$ Anaphase-$I$	$(r)$ Homologous chromosomes align at the equatorial plate
$(d)$ Telophase-$I$	$(s)$ Number of chromosomes reaching each pole is half of the original cell

What is the process of shifting of chiasmata towards the ends of the bivalents called?

In which phase of meiosis nuclear membrane and nucleolus are reformed?

Give the name of the phases of meiosis,in which
$I.$ the chromosome number is reduced to haploid state
$II.$ the amount of $DNA$ is reduced to haploid state
The correct option is