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: Gynaecology & Obstetrics
[{'content': 'A lady with 8 wks pregnancy presented with random blood glucose of 177mg/d1. The treatment is: \nSelect and explain. \nA. Phenformin, B. Sulfonylurea, C. Insulin, D. Glipizide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]