This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
Surgery in varicose veins is NOT attempted in presence of - 
Select and explain. 
A. Deep vein thrombosis, B. Varicose veins with leg ulcers, C. Presence of multiple incompetent perforators, D. All the above
A: Deep vein thrombosis
Answer: A: Deep vein thrombosis 
Explanation: Deep vein thrombosis is a contraindication for t/t of varicose veins. Varicose vein surgery should never be attempted in a case where deep vein thrombosis exists along with varicose veins, because in these cases superficial veins are the only valved venous pathway and excising them will only aggravate the condition. Ref : Bailey & Love 25/e p930