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': 'The following complications during pregnancy increase the risk of postpartum hemorrhage (PPH) except: \nSelect and explain. \nA. Hypertension, B. Macrosomia, C. Twin pregnancy, D. Hydramnios', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]