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: Medicine
In benign intracranial hypertension- 
Select and explain. 
A. There is a restriction of upgaze, B. Normal ventricles is found in 50% of cases, C. Brain scan in important in young woman to exclude sagittal sinus thrombosis, D. Optic nerve fenestration should be performed early before the vision is affected
C: Brain scan in important in young woman to exclude sagittal sinus thrombosis
Answer: C: Brain scan in important in young woman to exclude sagittal sinus thrombosis 
Explanation: None