Fertilization in humans is practically feasible only if:
A. the ovum and sperm are transported simultenousely to ampullary-isthmic junction of the cervix.
B. the sperms are transported into cervix within 48 hrs of release of ovum I uterus
C. the ovum and sperms are transported simultaneously to ampullary-istamic junction of the fallopian tube.
D. the sperms are transported into the vagina just after the release of ovum in fallopian tube.
