Which stages of cell division do the following figures $A$ and $B$ represent respectively?

Option	Figure $A$	Figure $B$
$(a)$	Metaphase	Telophase
$(b)$	Telophase	Metaphase
$(c)$	Late anaphase	Prophase
$(d)$	Prophase	Anaphase

$(1)$ Definition / Explanation: Chiasmata
$(2)$ Definition / Explanation: Syncytium

$(1)$ Give scientific reason: Meiosis is called reductional division.
$(2)$ Give scientific reason: Mitosis is necessary for growth,development,and repair of the cell.

While examining the mitotic stage in a tissue,one finds some cells with $16$ chromosomes and some with $32$ chromosomes. What possible reasons could you assign to this difference in chromosome number? Do you think cells with $16$ chromosomes could have arisen from cells with $32$ chromosomes or vice versa?

For a cell,$n \rightarrow 2n$ $(P)$ and $2n \rightarrow n$ $(Q)$. What are $P$ and $Q$?

Identify the correct statements.
$(i)$ Somatic cells undergo mitosis,and germ cells undergo meiosis.
$(ii)$ During mitosis,$DNA$ replicates once for one cell division,and in meiosis,$DNA$ replicates twice for two cell divisions.
$(iii)$ Meiosis and mitosis are observed in organisms that reproduce both sexually and asexually.