Fertilisation in humans is practically feasible only if
A. The sperms are transported into cervix within 48 hrs of release of ovum in uterus
B. The sperms are tranported into just after the release of ovum in fallopin tube
C. The ovum and sperm are transproted simultanecusly to ampullay - isthmic juction of the fallopain tube
D. The ovum and sperms are transproted simultaneously to ampullary - isthmic junction of the cervix
