Question: 147. The first menstruation is called:
(1) Menopause
(2) Menarche
(3) Diapause
(4) Ovulation
Answer: Option (2)
Explanation:
The first menstrual bleeding in a female, marking the onset of reproductive maturity, is called menarche. Menopause refers to the permanent cessation of menstrual cycles, ovulation is the release of an ovum from the ovary, and diapause is a developmental pause seen in some organisms.
Hence, menarche is the correct term for the first menstruation.