Prolactin (PPL) or LTH (Luteotropin hormone) is secreted by an anterior pituitary gland which stimulates mammary gland development and lactogenesis after child birth. The placenta is the strong connection between developing foetus and the uterine wall of the mother which play an important role in exchanging of material between mother and foetus. It secretes progesterone, estrogen, human Placental Lactogen (hPL) and human Chorionic Gonadotropin (hCG). Thus, the correct answer is option C.