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': 'Ultrasound is useful in detecting : \nSelect and explain. \nA. Placenta pre, B. Intra-uterine growth retardation, C. Foetus associated with ascites, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All of the above', 'role': 'assistant'}]