The correct answer is Option (4): Luteinising hormone

LH-Luteinizing Hormone is produced by the anterior pituitary gland. The placenta plays a crucial role in providing oxygen and essential nutrients to the developing embryo while facilitating the removal of carbon dioxide and waste products produced by the embryo. It forms a connection with the embryo through the umbilical cord, which serves as the conduit for the exchange of substances to and from the developing fetus.

Additionally, the placenta functions as an endocrine organ, producing various hormones that are important for maintaining pregnancy and supporting fetal development. Some of the hormones produced by the placenta include human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, among others. These hormones play essential roles in regulating pregnancy and ensuring the well-being of both the mother and the developing fetus.