Given below are events that lead to pregnancy and development of the embryo.

(i) Fertilization of egg

(ii) Maturation of egg

(iii) Release of egg

(iv) Embedding of the embryo in the thickened uterine wall.

Which of the following options gives the correct order of sequence in which they occur?

Every month one egg develops in the ovary which gets matured. After maturation, the ovary releases the egg. The egg travels through oviduct to the uterus, if there will be any sperm then sperm will fertilize the egg. The zygote will be formed as a result of fertilization which divides and redivides to form the embryo and this embryo gets attached to the thick uterine lining of the uterus for further development.