This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Surgery
A patient of Varicose veins came to hospital; intern was on duty. Which test he shall perform to rule out the DVT? 
Select and explain. 
A. Brodie Trendelenburg test, B. Pehes test, C. Thomas test, D. Ober test
B: Pehes test
Answer: B: Pehes test 
Explanation: Pehes test is used to differentiate between Varicose veins and Deep vein thrombosis. The limb is elevated and an elastic bandage is applied firmly from the toes to the upper 1/3 of the thigh to obliterate the superficial veins only. With the bandage applied the patient is asked to walk for 5 minutes. If deep system is competent, the blood will go through and back to the hea. If the deep system is incompetent, the patient will feel pain in the leg.