This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fibroids, Subject name: Gynaecology & Obstetrics
Fibroid uterus is the neoplasm that arises from: 
Select and explain. 
A. Endometrium, B. Myometrium, C. Perimetrium, D. Visceral peritoneum
B: Myometrium
Answer: B: Myometrium 
Explanation: Fibroid (Leiomyoma) is derived from smooth muscle cell rests either from vessel walls or uterine musculature.