Identify the statements which are NOT true for placenta:
1. Placenta is endocrine in nature.
2. Placenta is formed by the inner cell mass.
3. Placental hormones help in lactation after parturition.
4. Iron is connected to the embryo through an umbilical cord.

Correct option is C

The placenta is an essential organ for fetal development, providing oxygen and nutrients.
· (1) Placenta is endocrine in nature – Correct, as it secretes hormones like hCG, estrogen, and progesterone.
· (2) Placenta is formed by the inner cell mass – Incorrect, as it originates from the trophoblast layer, not the inner cell mass.
· (3) Placental hormones help in lactation after parturition – Incorrect, as prolactin from the pituitary gland, not placental hormones, controls lactation.
· (4) Iron is connected to the embryo through the umbilical cord – Correct, as nutrients including iron are transported via the placental-umbilical cord connection.