All are true about DVT EXCEPT

(C) Most important sign is colour change of limb # DVT: The thrombus may commence in a venous tributary of a main vein.> The calf is the most frequent site of thrombosis.> From here thrombus extends in a serpentine fashion into the main deep veins, where a portion may break off to cause pulmonary embolus.> The three most important signs which may be present in a case of deep vein thrombosis are swelling, tenderness & Homans' sign.