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
In retinal aery angiogram dye injected through? 
Select and explain. 
A. Retinal aery, B. Antecubital vein, C. Ophthalmic aery, D. Femoral vein
B: Antecubital vein
Answer: B: Antecubital vein 
Explanation: Ans. is 'b' i.e., Antecubital vein Angiography for fundus examination Angiography is used for dynamic flow study of Iris ,Retina or choroid . Following types of angiographies are used:? Fluorescein Angiography : - Sodium fluorescein dye is used by injecting it into antecubital vein. It is primarily used for retinal aery angiography, but iris & choroid can also be examined. Indocyanine green Angiography :- It is used primarily for choroidal vasculature, especially in choroidal neovascular membranes (CNVM). Therefore, it is used in - i) The identification and delineation of poorly?defined or occult choroidal neovascularization, (ii) Retinal pigmented epithelium (RPE) detachments.