<prompt> Most common site of venous thrombosis: March 2013Veins of upper extremityVeins of lower extremityDural sinusPoal vein  <response>: Ans. B i.e. Veins of lower extremity Commoner sites of venous thrombosis includes deep vein in the lower extremity below the knee and superficial saphenous, hepatic and renal veins; dural sinuses. 