This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors of Nervous System, Subject name: Medicine
Which is not a characteristic feature of pseudo tumour cerebri? 
Select and explain. 
A. Headache, B. Dilated ventricles, C. Increasing opening pressure during LP, D. Papilledema
B: Dilated ventricles
Answer: B: Dilated ventricles 
Explanation: Ans: B. Dilated ventriclesRef: Harrison's Textbook of Internal Medicine- 18th edExplanation:Pseudo tumour cerebri:HeadacheNormal CSFNormal or small ventricular sizeCT & MR1 are normalNo focal neurological deficitsTransient visual obscurations & papilloedemaCauses:Metabolic causesHypervitaminosis AVit A deficiencySteroid therapySteroid withdrawalTetracuclineNalidixic acidIrom deficeincyHyper parathyroidismAdrenal insufficiency-Chromic 02 retentionAmiodaroneInfections causesPoliomyelithisGuiIlian barre syndromeOtitis media