In which of the following stages are the chromosomes seen as unclear or thread-like?

Match the stages of meiosis in Column $I$ to their characteristic features in Column $II$ and select the correct option using the codes given below.

Column $I$	Column $II$
$A$. Diakinesis	$1$. Crossing over takes place
$B$. Pachytene	$2$. Terminalisation of chiasmata
$C$. Zygotene	$3$. Chromosomes align at equatorial plate
$D$. Metaphase	$4$. Pairing of homologous chromosomes

Codes:
$A \quad B \quad C \quad D$

The function of recombinase is found in which stage of meiosis?

The enzyme recombinase is required at which stage of meiosis?

The synaptonemal complex is first seen in ...........

Meiosis can be observed in