<prompt> Predisposing factor for aerial thrombosis:AT III deficiencyProtein S deficiencyProtein C deficiencyHomocystenemia  <response>: Answer is D Homocystenemia Homoeystenemia is associated with increased risk of aerial thrombosis. Deficiency of AT III, Protein C and Protein S predisposes to venous thrombosis and not aerial thrombosis. Abnormality Aerial Venous Factor V Leiden mutation -- Prothrombin -- Antithrombin III -- Protein C -- Protein S -- Homorysteinemia Antiphospholipid syndrome 