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
First line drug used for painful diabetic neuropathy is? 
Select and explain. 
A. Carbamazepine, B. Duloxetine, C. Venlafaxine, D. EMLA
B: Duloxetine
Answer: B: Duloxetine 
Explanation: Ans. (b) DuloxetineRef: Harrison 18/e, chapter 384