In pachytene,each tetrad contains

$A-$ In meiosis,during anaphase $I$,homologous chromosomes move to the opposite poles.
$R-$ Each pole receives half the number of chromatids in anaphase $I$.

In which phase do the chromatids separate even at the site of chiasmata formation?

What does Meiosis-$II$ represent?

In the pachytene stage:

Arrange the following stages of meiosis $I$ in the correct sequence:
$(a)$ Crossing over
$(b)$ Synapsis
$(c)$ Terminalization of chiasmata
$(d)$ Disappearance of nucleolus