Which of the following event marks the second stage of labour ?

The correct option is C

Baby moves out of the birth canal

During the first stage of labour the amniotic sac ruptures. The amniotic fluid escapes out of the vagina and helps lubricate the birth canal. The second stage of labour is the actual birth of the baby due to increased uterus contractions. The third stage begins shortly after the delivery of the baby in which the placenta is expelled out of the vagina.