Kalli,35 yrs old female presents with Bilateral deep vein thrombosis in legs.There is past history of recurrent foetal loss and one attack of pulmonary embolism.Screening tests of coagulation reveal a prolonged APPT.Likely diagnosis is:

• A. Inherited protein C and S deficiency
• B. Factor VIII deficiency
• C. Hereditary excess of Anti thrombin III
• D. Anti phospholipids syndrome