What does ‘a’, ‘b’ and ‘c’ represents in the following flow chart

Options

A. ‘a’ = progesterone, ‘b’ = oxytocin, ‘c’ = slow contraction of uterus
B. ‘a’ = oxytocin, ‘b’ = uterus, ‘c’ = slow contraction of uterus
C. ‘a’ = placenta, ‘b’ = oxytocin, ‘c’ = vigorous contraction of uterus
D. ‘a’ = oxytocin, ‘b’ = placenta, ‘c’ = vigorous contraction of uterus

Answer

D

Explanation

Oxytocin released by posterior pituitary stimulate uterine iterate contraction. As the contractions intensify the baby’s body stretches the cervix for delivery.