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': 'Which is not true about cephalohaematoma? \nSelect and explain. \nA. Not limited by sutures, B. Swelling subsides in 3 months, C. Caused by periosteal injury of skull, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Not limited by sutures', 'role': 'assistant'}]