During which phase do homologous chromosomes show maximum attraction?

During which stages (or prophase $I$ substages) of meiosis do you expect to find the bivalents and $DNA$ replication respectively?

The separation of homologous chromosomes occurs in .........

In which phase of meiosis do the sister chromatids separate and move towards opposite poles?

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

Choose the correct statements from the following:
$(I)$ Diakinesis is the middle phase of prophase-$I$.
$(II)$ Diakinesis is marked by the terminalization of chiasmata.
$(III)$ Meiotic spindle is not formed during diakinesis.
$(IV)$ By the end of diakinesis,the nucleolus disappears.