Question

this muscular layer of the wall of the uterus can develop benign tumors called fibroids.
muscularis mucosa
tunica muscularis
myometrium
none of the above

Explanation:

The myometrium is the thick, muscular middle layer of the uterine wall. Benign tumors known as fibroids (leiomyomas) arise specifically from the smooth muscle cells of this layer. The muscularis mucosa is a thin muscle layer in the mucosal lining of hollow organs (not the uterine wall's main muscular layer), and tunica muscularis is a general term for the muscular layer of tubular organs, not specific to the uterus.

Answer:

Myometrium