Human placenta is called haemochorial because . . . . . . .

• A
  it is attached to the wall of ovary of mother and umbilical cord.
• B
  the maternal blood comes in direct contact with the foetal chorionic villi.
• C
  it is a flattened and discoidal organ,present in the uterus of all females.
• D
  it acts as an endocrine tissue and produces hormones like $hCG$,$HPL$,progesterone,and estrogen.