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: Ophthalmology
Gonioscopy is used to study 
Select and explain. 
A. Ant. Chamber, B. Post chamber, C. Angle of anterior chamber, D. Retina
C: Angle of anterior chamber
Answer: C: Angle of anterior chamber 
Explanation: C i.e. Angle of anterior chamber Gonioscopy is examination of angle of anterior chamber Q.