This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
Brain sparing effect on Doppler is seen in which vessel? 
Select and explain. 
A. Umbilical artery, B. Fetal MCA, C. Fetal ductus venosus, D. Uterine artery
B: Fetal MCA
Answer: B: Fetal MCA 
Explanation: Ans BBrain sparing effect is loss of normal high resistance flow in the MCA secondary to shunting of blood to important structures in fetal hypoxia.