Surgery Which one of the following is the investigation of choice for suspected deep vein thrombosis of the lower extremity ? A Radioactive labelled fibrinogen uptake B Ascending contrast phlebography C D-dimer estimation D Duplex ultrasonography 💡 Explanation Which one of the following is the investigation of choice for suspected deep vein thrombosis of the lower extremity ? ✓ Correct Answer: D. Duplex ultrasonography