This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following antenatal complications may cause placentomegaly? \nSelect and explain. \nA. Hypeension, B. Diabetes, C. Abruption, D. HIV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Placentomegaly- Causes Maternal causes: Diabetes Anemia and malnutrition Infections: TORCH , CMV, Parvo virus, syphilis. Fetal causes Hydrops fetalis: Rh incompatibility, ABO incompatibility, fetal cardiac failure Chronic intrauterine infections Umbilical vein obstruction H mole TTTS Placental causes Placental tumours: chorangioma', 'role': 'assistant'}]