In which of the following stages is the chromosome thin and like a long thread?

Match the stages of prophase $I$ given in Column-$I$ with their features in Column-$II$ and choose the correct options from the choices given below:

Column $I$	Column $II$
$A$. Leptotene	$i$. Chromosomes visible under light microscope
$B$. Zygotene	$ii$. Chromosomes start pairing together
$C$. Pachytene	$iii$. Exchange of genetic materials between non-sister chromatids of the homologous chromosomes.
$D$. Diplotene	$iv$. Dissolution of synaptonemal complex
$E$. Diakinesis	$v$. Terminalisation of chiasmata

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

What is the number of chromatids in each chromosome during synapsis?

How does $Anaphase-I$ differ from $Anaphase-II$?

$A$: Each chromosome of a bivalent attaches with two spindles in metaphase.
$R$: In metaphase,bivalents migrate towards the metaphasic plate.