Final answer:
The female homologue of the rectovesical septum is the rectovaginal septum, which is the layer of tissue that separates the rectum from the vagina.
Step-by-step explanation:
The female homologue of the rectovesical septum is the rectovaginal septum (Option B), which is a layer of tissue separating the rectum from the vagina. This anatomical structure is equivalent to the male's rectovesical septum, separating the rectum from the bladder. It is not to be confused with the pubocervical fascia, urogenital diaphragm, or the vesicouterine pouch, which are other structures within the pelvic region.