This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Manifestations, Subject name: Ophthalmology
ETDRS vision chart study is done in patients with diabetic retinopathy. ETDRS stands for : 
Select and explain. 
A. Extended therapy for diabetic retinopathy & its study, B. Emergency treatment for diabetic retinopathy and study, C. Eye testing or rotatory drum & its study, D. Early treatment for diabetic retinopathy study
D: Early treatment for diabetic retinopathy study
Answer: D: Early treatment for diabetic retinopathy study 
Explanation: Ans. is 'd' i.e., Early treatment for diabetic retinopathy study By seeing these type of questions, don't make an impression that anything can be asked from anywhere in PG exams. These are always 2-3 rare questions in a paper and they are very rarely repeated. Don't let them deter you from preparing the most probable topics and questions. Prepare the most probable and most probably you get selected.