During which stage of meiosis,do the sister chromatids begin to move towards the poles?

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

During which phase of meiosis do chromosomes pair up and begin to separate from each other?

How do chromosomes appear during the pachytene stage of meiosis?

Match the following stages of meiosis with their respective events:

List-$I$	List-$II$
$a$. Zygotene	$i$. Terminalization
$b$. Pachytene	$ii$. Chiasmata
$c$. Diplotene	$iii$. Crossing over
$d$. Diakinesis	$iv$. Synapsis

Select the correct option: $a \quad b \quad c \quad d$

The complex formed by a pair of synapsed homologous chromosomes is called,