UKMLA PLAB AMC USMLE Prometric MCQ

a) is commoner in the ureter of the lower collecting system in duplicated ureteric systems
b) is present in about 20% when the ureter enters a diverticulum
c) Reflux is seen in more than half of cases of posterior urethral valves
d) there is an increased incidence in asymptomatic siblings of children with reflux
e) In grade II reflux spontaneous resolution is likely