The correct option is C Urine formation
Placenta is called the ‘lifeline’ between the mother and foetus. It connects the mother to the foetus and via the umbilical cord, aids in the transfer of respiratory gases, nutrients and waste elimination from the foetus. Fetal urine is produced by the renal system of the baby after the kidneys develop and urine is added to the amniotic fluid. Placenta is not involved in urine formation.