Identify the odd one from the following:

1. labia minora

2. fimbriae

3. infundibulum 

4. isthmus

   (a) The female accessory ducts constitute the oviducts (Fallopian tubes), uterus and vagina. Each Fallopian tube extends from the periphery of each ovary to the uterus. The part closer to the ovary is the funnel-shaped infundibulum.
The edges of the infundibulum possess finger-like projections called fimbriae. The infundibulum leads to a wider part of the oviduct called ampulla. The last part of the oviduct is isthmus. While, labia minora is the female external genitalia