Read the following statements about menstrual cycle and select two correct statements.
(i) Lack of menstruation may be indicative of pregnancy.
(ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only.
(iii) LH surge induces ovulation.
(iv) If fertilization occurs, corpus luteum degenerates immediately

Options

A. I and ii
B. ii and iii
C. I and iii
D. ii and iv