This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Radial arteries bifurcate at which junction in uterine body 
Select and explain. 
A. At junction of uterus and cervix., B. At endometrium - myometrium junction., C. At junction of uterus and fallopian tube., D. At cervico - vaginal junction.
B: At endometrium - myometrium junction.
Answer: B: At endometrium - myometrium junction. 
Explanation: Radial arteries bifurcate at endometrium-myometrium junction to create basal and spiral arteries.