From a to d which of the following statements are correct ?
(a) Fertilisation can occur only if the ovum and sperm are transported simultaneously to the ampullary isthmic junction
(b) First movement of foetus and appearance of hair on head are usually observed during the fifth month of pregnancy .
(c) On `14^(th)` day of Menstrual cycle , the level of progesterone is maximum .
(d) The signals for parturition originate from fully developed foetus and placenta

Options

A. a and c
B. b and c
C. c and d
D. b and d

Answer

D