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': 'Commonest complication of diabetes, complicating pregnancy is : \nSelect and explain. \nA. VSD, B. ASD, C. Sacral agenesis, D. Anencephaly', 'role': 'user'}, {'content': 'Answer: A \nExplanation: VSD', 'role': 'assistant'}]