Final answer:
The Fallopian tubes are lined by ciliated columnar epithelium, have fimbriae that help transport the ovum, and can be a site of ectopic pregnancy, making option 5 ('a', 'b', and 'c') the correct answer.
Step-by-step explanation:
Fallopian Tubes Function and Ectopic Pregnancy
The Fallopian tubes are a crucial component of the female reproductive system, serving as passageways that carry eggs from the ovaries to the uterus. These tubes are lined with ciliated columnar epithelium, which helps in the transportation of the egg toward the uterine cavity. The Fallopian tubes feature projections called fimbriae at their ovarian ends which have a waving motion to guide the eggs into the tubes - a process critical for fertility and the possibility of fertilization.
An ectopic pregnancy can occur if a fertilized egg implants itself in the Fallopian tube rather than the uterus. This condition is a medical emergency and can have serious implications if not treated promptly. Under normal circumstances, should fertilization occur, the embryo is transported towards the uterus for development – a journey that usually takes a week.
In summary, the Fallopian tubes not only help carry the secondary oocyte (ovum) towards the uterine cavity with the assistance of fimbriae but may also be the site of ectopic pregnancy and are indeed lined by ciliated columnar epithelium. Hence, the correct answer to the student's question would be option 5, which includes all three statements: 'a', 'b', and 'c'.