This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Which of the following antidiabetic drugs cause weight loss? \nSelect and explain. \nA. Metformin, B. SFU, C. Insulin, D. Nateglinide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Metformin a biguanide and insulin sensitizer produce weight loss so drug of choice for type 2 DM with obesity. Also used in cases of Polycystic ovarian disease. Ref: HL, KK Sharma 3rd ed pg 646', 'role': 'assistant'}]