Where is the zygote located in the flower after fertilization?

Length of pollen tube depends on the distance between :

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

In a flower, the parts that produce male and female gametes (germ cells) are

Which of the following statements are true for flowers?
$(i)$ Flowers are always bisexual
$(ii)$ They are the sexual reproductive organs
$(iii)$ They are produced in all groups of plants
$(iv)$ After fertilization they give rise to fruits

Distinguish between pollination and fertilisation. Mention the site and product of fertilisation in a flower.
Draw a neat,labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.