Subject :NSO Class : Class 10
Observe the given graph showing changes in endometrium in a female during her menstrual cycle and select the correct statement regarding P, Q, R and S. 
ADuring phase P, secretion of FSH and estrogen increases, which develops the uterine lining.
B Phase R involves release of ovum from an ovary, marked by peak levels of LH and progesterone.
C In phase Q, relaxin hormone attains a peak and repairs endometrium of uterus.
D During phase S, progesterone is secreted from ovary and maintains thickness of endometrium.