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
True about Secondary hemorrhage is? 
Select and explain. 
A. 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.
A: It usually occurs after 7-14 days after surgery
Answer: A: It usually occurs after 7-14 days after surgery 
Explanation: None