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
Which of the following test is used to detect perforator incompetence in varicose- 
Select and explain. 
A. Trendelenberg test, B. Fegan's test, C. Morissey's test, D. Homan's test
A: Trendelenberg test
Answer: A: Trendelenberg test 
Explanation: None