The correct option is B Both A and R are true but R is NOT the correct explanation of A.
Menopause:
Menopause marks the end of the reproductive phase of a woman’s life. At 45 to 50 years of age, the menstrual cycle stops. Stoppage of menstruation is termed as ‘menopause’. During menopause psychological symptoms such as anxiety, irritability, fatigue and loss of concentration may occur.
Menarche:
The first menstrual flow begins at puberty and is termed menarche. The ova begin to mature with the onset of puberty. It is the beginning of adolescence, during which mental and emotional maturation occurs and physical growth becomes pronounced.