Which of the following events are a part of a menstrual cycle?
i. The pituitary gland stimulates ovaries to produce oestrogen and progesterone hormones.
ii. Egg or the female gamete is released.
iii. Oestrogen stimulates the uterus to build up extra tissue and blood layer to make the wall nutritious for a zygote.
iv. In the absence of fertilisation, the egg or the female gamete is eliminated from the body along with the uterus lining which comes out as blood at the time of menstruation.