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
Fluorescent dye for ophthalmological diagnosis is injected in – 
Select and explain. 
A. Antecubital vein, B. Popliteal vein, C. Femoral vein, D. Subclavian vein
A: Antecubital vein
Answer: A: Antecubital vein 
Explanation: The technique of fluorescein angiography comprises rapidly injecting 5 ml of 10% solution of sterile sodium fluorescein dye in the antecubital vein and taking serial photographs of the fundus.