Which of the following relates to the term "after-birth"?

The correct option is B Expulsion of placenta, umbilical cord and foetal membrane
Parturition or childbirth is the event of bringing a child into the world from the uterus of the mother. It involves forceful muscle contractions of the uterine wall which push the child out of the womb through the vaginal canal. Several events take place after the birth of the child, including expulsion of the placenta, umbilical cord, and fetal membrane.

So, the correct answer is 'Expulsion of the placenta, umbilical cord, and fetal membrane'.