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
Circulus iridis major is seen at – 
Select and explain. 
A. Ciliary body, B. Root of iris, C. Colarette of iris, D. Pupillary margin of iris
B: Root of iris
Answer: B: Root of iris 
Explanation: Circulus arteriosus iridis major →Root of iris.
Circulus arteriosum minor → At papillary margin of iris.