The correct answer is option 'B' - Menopause.

Explanation:
Menopause is the stage in a woman's life when her menstrual cycle stops permanently. It usually occurs around the age of 50, but it can vary between individuals. During menopause, the production of hormones in a woman's body decreases, leading to the end of her reproductive years.

Menstrual Cycle:
The menstrual cycle is a monthly process that occurs in women of reproductive age. It involves the release of an egg from the ovaries (ovulation), thickening of the uterine lining, and shedding of the lining if fertilization does not occur (menstruation). This cycle repeats itself approximately every 28 days.

Puberty and Adolescence:
Puberty is the stage of life when a person's body undergoes various physical changes, such as the development of secondary sexual characteristics like breast growth, body hair, and menstruation in girls. Adolescence refers to the transitional period between childhood and adulthood, which includes puberty.

Menarche:
Menarche is the term used to describe a girl's first occurrence of menstruation. It typically occurs around the age of 12-14, but it can vary. Menarche marks the beginning of a girl's reproductive capacity, and her menstrual cycles will continue until menopause.

Menopause:
Menopause is a natural biological process that occurs in women as they age. It is defined as the permanent cessation of menstrual periods for 12 consecutive months. During menopause, the ovaries stop releasing eggs, and the production of hormones, such as estrogen and progesterone, declines. This leads to various physical and emotional changes in a woman's body, including the end of her ability to conceive.

Conclusion:
In summary, the correct answer is option 'B' - Menopause. This marks the permanent cessation of a woman's menstrual cycle, typically occurring around the age of 50. Puberty refers to the onset of sexual maturity, menarche is the first occurrence of menstruation, and adolescence is the transitional period between childhood and adulthood.