The correct option is D Both assertion and reason are incorrect.
A hysterectomy is an operation procedure used to remove the uterus (womb). The uterus cradles and nourishes a fetus from conception to birth, and aids in the delivery of the baby. It also produces the monthly menstrual flow or period. The ovaries have two major functions. One is the production of eggs or ova, which permit childbearing. The second is the production of hormones or chemicals, which regulate menstruation and other aspects of health and well-being, including sexual well-being. If the egg, that is released during a woman's normal monthly cycle is not fertilized, the lining of the uterus is shed by bleeding (menstruation). After a hysterectomy, a woman can no longer have children and menstruation stops. The ovaries generally continue to produce hormones and undergo monthly cycle under the influence of pituitary hormones, although in some cases they may have reduced activity. Some hysterectomies also include removal of the ovaries, so the supply of essential female hormones is greatly reduced. This can have various effects. Thus, the correct answer is option D.