Which of the following statements is incorrect?
(A) Placenta allows exchange of materials r between mother and fetus.
(B) The fetal part of the placenta consists of the cells of the chorionic which produce projections called chorionic villi.
(C) Antibody cannot cross the placenta from mother to fetus.
(D) Placenta secretes pregnancy hormones required for supporting fetal growth and metabolic changes in mother during pregnancy.
