In which of the following stages do chromosomes appear long,thin,and thread-like?

Match the following stages of meiosis with their characteristic events:
$(a)$ Zygotene $(i)$ Terminalization
$(b)$ Pachytene $(ii)$ Chiasmata
$(c)$ Diplotene $(iii)$ Crossing over
$(d)$ Diakinesis $(iv)$ Synapsis
Select the correct option from the following:

All are the essential stages that take place during meiosis,except:

If there were $4$ chromosomes present during prophase,how many chromosomes are there in each cell at the end of anaphase $II$?

Meiotic cell division takes place during

In pachytene,each tetrad contains