Regarding Meiosis,which of the statements is incorrect?

At which phase of meiosis,bivalent chromosomes align on the equatorial plate $:-$

Match List-$I$ with List-$II$ :

List-$I$ (Sub Phases of Prophase-$I$)	List-$II$
$A$. Diakinesis	$I$. Synaptonemal complex formation
$B$. Pachytene	$II$. Completion of terminalisation of chiasmata
$C$. Zygotene	$III$. Chromosomes look like thin threads
$D$. Leptotene	$IV$. Appearance of recombination nodules

Choose the correct answer from the options given below:

During $meiosis-I$,the bivalent chromosomes clearly appear as tetrads during

Which of the following events occurs only during meiosis?

Which of the following statement$(s)$ is/are not correct about meiosis?
$I.$ Meiosis involves pairing of homologous chromosomes and recombination between them.
$II.$ Two diploid cells are formed at the end of meiosis-$II$.
$III.$ Meiosis involves two sequential cycles of nuclear and cell division called meiosis-$I$ and meiosis-$II$,but only a single cycle of $DNA$ replication.
$IV.$ Meiosis-$I$ is initiated after the parental chromosome replication which produces identical sister chromatids at the $S$-phase.
The correct option is