Released from the ovary:
The correct answer is option B, the secondary oocyte is released from the ovary.

Explanation:
The process of release of the secondary oocyte from the ovary is known as ovulation. Ovulation is a part of the menstrual cycle and occurs approximately once every 28 days in women of reproductive age.

Oogenesis:
Before we understand the release of the secondary oocyte, let's briefly discuss the process of oogenesis. Oogenesis is the process of egg cell formation in females. It begins during fetal development and continues throughout a woman's reproductive years.

During fetal development, cells called oogonia undergo mitosis to increase their numbers. These oogonia then differentiate into primary oocytes, which are diploid cells. The primary oocytes are arrested in prophase I of meiosis until the onset of puberty.

The ovarian cycle:
The ovarian cycle consists of several stages, including follicular phase, ovulation, and luteal phase. During the follicular phase, a group of follicles in the ovary begins to mature under the influence of follicle-stimulating hormone (FSH) secreted by the pituitary gland.

Graafian follicle:
Among the maturing follicles, one dominant follicle becomes the Graafian follicle. The Graafian follicle secretes estrogen, which stimulates the thickening of the endometrium (lining of the uterus) in preparation for potential implantation of a fertilized egg.

Ovulation:
During ovulation, the Graafian follicle ruptures, releasing the secondary oocyte from the ovary. The secondary oocyte is a haploid cell that has completed the first meiotic division. It is arrested in metaphase II of meiosis until fertilization occurs.

The released secondary oocyte is then swept into the fallopian tube, where it awaits fertilization by a sperm. If fertilization occurs, the secondary oocyte completes meiosis II, resulting in the formation of a mature ovum (egg) and a second polar body.

Conclusion:
In summary, the secondary oocyte is the cell that is released from the ovary during ovulation. It is the result of the maturation and release of the Graafian follicle.

Oogonium is formed b4 birth at the Third trimester stage
primary oocyte is arrested at prophase I stage till puberty
graffian follicle provides for the maturation and release of a fertilizable oocyte. It also forms the corpus luteum, which promotes and maintains implantation of the embryo
secondary oocyte is released from the ovary