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: Surgery
[{'content': 'True about Secondary hemorrhage is? \nSelect and explain. \nA. It usually occurs after 7-14 days after surgery, B. It is usually caused by raised blood pressure, C. It can occur due to slipping of ligature., D. It is due to venous refilling of blood.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]