What is the process of nuclear division called during which the chromosome number is reduced to half?

The genetic constitution of chromosomes changes after this type of cell division.

During meiosis $I$,the chromosomes start pairing at

The diplotene phase of meiosis is also characterised by:
$a$. Desynapsis
$b$. Complete terminalisation of chiasmata
$c$. Dictyotene stage
$d$. Complete disappearance of nuclear membrane and nucleoli
$e$. Complete development of astral rays and aster
$f$. Longest phase of prophase-$I$

Can you recall meiosis and indicate at what stage a recombinant $DNA$ is made?

The temporarily suspended stage of diplotene during meiosis-$I$ is known as: