In the figure,the parts $A$,$B$,and $C$ are sequentially:

Which among the following statements are true for unisexual flowers?
$(i)$ They possess both stamen and pistil
$(ii)$ They possess either stamen or pistil
$(iii)$ They exhibit cross pollination
$(iv)$ Unisexual flowers possessing only stamens cannot produce fruits

Which among the following statements are true for sexual reproduction in flowering plants?

In a tobacco plant,the male gametes have $24$ chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?

The correct sequence of reproductive stages seen in flowering plants is

Differentiate between self-pollination and cross-pollination.