This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Drug of choice for pain relief in diabetic neuropathy is- \nSelect and explain. \nA. Gabapentin, B. Lamotrigene, C. Pregabalin, D. Mexiletene', 'role': 'user'}, {'content': "Answer: C \nExplanation: Chronic, painful diabetic neuropathy is difficult to treat but may respond to duloxetine, amitriptyline, gabapentin, valproate, pre- gabalin, or opioids. Two agents, duloxetine and pregabalin, have been approved by the U.S. Food and Drug Administration (FDA) for pain associated with diabetic neuropathy, but no treatments are satisfactory. Reference : page 2427 Harrison's Principles of Internal Medicine 19th edition", 'role': 'assistant'}]