This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
All of the following are true statements with respect to angle closure glaucoma except : 
Select and explain. 
A. Doesn't cause ocular pain at evening-night, B. Vogt's triad is indicative of acute active attack of angle closure glaucoma, C. Bullous keratopathy and shallow anterior chamber may be seen, D. I.v Mannitol is Drug of Choice for angle closure glaucoma
B: Vogt's triad is indicative of acute active attack of angle closure glaucoma
Answer: B: Vogt's triad is indicative of acute active attack of angle closure glaucoma 
Explanation: Vogt's triad is associated with angle closure glaucoma. characterised by : iris atrophy peripheral anterior synechiae glaucomaflecken. Vogt's triad is indicative of past attack. Typically pain due to angle closure is severe and does not allow patient to sleep. Episodes of angle closure glaucoma tend to occur in dim background illumination due to a mid-dilated pupil which increases the chances of an irido-lenticular touch and hence block in circulation of the aqueous from the posterior chamber to the anterior chamber. Shallow Anterior Chamber is the hallmark of Angle Closure Glaucoma Bullous keratopathy occurs in long standing angle closure glaucoma in end stage IV Mannitol is used to reduce the IOP by shrinking volume of vitreous, allowing lens to move backwards and allowing for break in the irido-lenticular contact that precipitates the angle closure attack