Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F).
(i) The scrotum acts as a thermoregulator, maintaining the testes at a temperature `2^(@)` lower than that of the body
(ii) Corona radiate layer of the ovum prevents polyspermy.
(iii) Middle part of ear is derived from the endoderms layer.
(iv) The hormone, human chorionic gonadotropin facilitates parturition by softening the connective tissue of the public symphysis.