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': 'Gyrate atrophy is a retinal degenerative disease involving deficiency of ornithine transcarbamoylase enzyme. Such patients are benefited by \nSelect and explain. \nA. Ornithine free diet, B. Arginine free diet, C. Pyridoxine and folic acid, D. Vitamin B1, B6 and B12', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Arginine free diet', 'role': 'assistant'}]