This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Venous Insufficiency, Subject name: Surgery
Investigation of choice in DVT is - 
Select and explain. 
A. Venogram, B. Colordoppler, C. Plethysmography, D. X-ray
B: Colordoppler
Answer: B: Colordoppler 
Explanation: Ans. is 'b' i.e., Color doppler