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
[{'content': 'The electroretinogram may assist in the diagnosis of all of the following, except: \nSelect and explain. \nA. Bilateral disease, B. Progression of retinal disease, C. Clinically unsuspected disease in familial degenerations, D. Complications of glaucoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Complications of glaucoma', 'role': 'assistant'}]