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
The electroretinogram may assist in the diagnosis of all of the following, except: 
Select and explain. 
A. Bilateral disease, B. Progression of retinal disease, C. Clinically unsuspected disease in familial degenerations, D. Complications of glaucoma
D: Complications of glaucoma
Answer: D: Complications of glaucoma 
Explanation: Ans. Complications of glaucoma