oogenesis is the process of egg formation in females. The process of formation of the ovum is as follows
- primary oocyte
- secondary oocyte
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Though the original question is terribly unclear; seemingly the question wanted to mean "what should be the correct time-order of the following structures in the process of oogenesis in human?".
(In human) After that, meiosis-2 take place; where the secondary oocyte give rise to 2 haploid cell: an (1) Ovum and a (2) secondary polar body. In other hand; the first polar body also due to meiosis-2 division, gives 2 haploid cells (both are secondary polar body).
So the order would be
Oogonium(1)-->Primary oocyte (2)--> secondary oocyte (3)--> ovum (4) if they meant the temporal order of these structures.
*Advanced BIOLOGY: Principles and Application; by C.J. Clegg and D.G. MacKean; John Murray publishing; copyright 1994.