Which of the following pairs is correctly matched?

Where does the structural transformation of sperm occur?

Fertilisation of an egg cell means......
$(1)$ End of the process of oogenesis
$(2)$ Induces the completion of the second meiotic division
$(3)$ The corpus luteum degenerates
$(4)$ Signals for maintaining progesterone levels in the blood
$(5)$ Formation of a zygote

Match the column-$I$ with column-$II$.

Column-$I$	Column-$II$
$(A)$ Leydig cells	$(i)$ Provides nutrition to developing sperm
$(B)$ Sertoli cells	$(ii)$ Secrete mainly progesterone
$(C)$ Corpus luteum	$(iii)$ Secrete inhibin
$(D)$ Developing follicle	$(iv)$ Secrete androgen

Match the columns.

Column $I$	Column $II$
$(a)$ Testis and ovary	$(1)$ Part of reproductive organ that transports germ cells
$(b)$ Clitoris	$(2)$ Developing fleshy fold surrounding both sides of the urogenital groove
$(c)$ Oviduct	$(3)$ Gametes which produce germ cells
$(d)$ Scrotum,labium majora	$(4)$ Organs associated with sexual response

Given below are the events in human reproduction. Write them in correct sequential order: Insemination,gametogenesis,fertilisation,parturition,gestation,implantation.