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
All except one are true regarding modified perthes test 
Select and explain. 
A. Tourniquet applied below saphenofemoral junction, B. Only subjective test, C. There should be no perforator incompetence to do this test, D. Shrinkage of varicose veins on testing indicates normal deep veins
B: Only subjective test
Answer: B: Only subjective test 
Explanation: Modified perthes test is both subjective and objective test,