This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Diabetes Mellitus, Subject name: Gynaecology & Obstetrics
[{'content': 'Potential candidate for high risk of GDM is. . \nSelect and explain. \nA. Young Primigravida, B. Unexplained perinatal loss, C. Presence of oligohydramnios, D. Previous low bih weight baby', 'role': 'user'}, {'content': 'Answer: B \nExplanation: High-risk of gestational diabetes History of stillbih History of neonatal death History of fetal macrosomia Concomitant obesity and/or hypeension Diabetes in a first-degree relative Overweight before pregnancy Strong family history of type II DM Previous history of GDM', 'role': 'assistant'}]