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': 'Arden index is related to – \nSelect and explain. \nA. ERG (Electroretinogram), B. EOG (Electroculogram), C. VER (Visual Evoked response), D. Perimetry', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Arden index is related to Electrooculography\nInterpretation of results:- Results of EOG are interpreted by finding out the Arden ratio as follows :\n\nArden ratio = Minimum height of light peak / Minimum height of dark trough \xa0x 100\n\nNormal curve values are 185 or above.\nSubnormal curve values are less than 150.\nFlat curve values are less than 125.', 'role': 'assistant'}]