During oogenesis, the secondary oocyte forms:

The correct answer is Option (2) → Ovum

In oogenesis the primary oocyte completes meiosis I and gives a large secondary oocyte and a tiny first polar body. The secondary oocyte is released at ovulation. It completes meiosis II only after a sperm enters it. This division is unequal and gives a haploid ovum (ootid) and a second polar body.

(1) Oogonia — Incorrect. These are the cells from which the primary oocytes arise, long before. They do not come from the secondary oocyte.

(2) Ovum — Correct. It forms when the secondary oocyte completes meiosis II.

(3) First polar body — Incorrect. It forms together with the secondary oocyte at the end of meiosis I. The secondary oocyte does not form it.

(4) Primary oocyte — Incorrect. This is the cell that gives rise to the secondary oocyte. It is the earlier stage, not the product.

NCERT Extract:
Fertilisation and Implantation – “… This induces the completion of the meiotic division of the secondary oocyte. The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid).”