This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Patient underwent inguinal lymph node dissection and drain was placed. On 10th day severe bleeding occurs. What type of bleeding is this? \nSelect and explain. \nA. Reactionary hemorrhage, B. Secondary, C. Primary, D. Tertiary', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Secondary* Secondary hemorrhage is due to sloughing of wall of vessel. It usually occurs 7-14 days after injury and is precipitated by factors such as infection,pressure necrosis or malignancy.', 'role': 'assistant'}]