In human female fertilization occurs at the junction of__________________

Correct option is C

the fallopian tubes or the oviduct in human female is differentiated into three parts, the infundibulum is the part which is closer to the ovary, ampulla is the part that leads to the wider part of the oviduct and isthmus that is the last and narrow part having narrow lumen that links to the uterus, fertilization takes place at the junction of ampulla and the isthmus.