<prompt> Which of the following acquired conditions is low risk for thrombosis?Heparin induced thrombocytopeniaOral contraceptive useAntiphospholipid antibody syndromeMyocardial infarction  <response>: Ans. is b i.e., Oral contraceptive use Hypercoagulable statesPrimary GeneticCommonFactor V mutation Arg to Glu substitution in amino acid residue 506 leading to resistance to activatedprotein C; factor V leidenProthrombin mutation G2021QA noncording sequence variant leading to increased prothrombin leveisIncreased levels of factors VIII, IX, XI or fibrinogen genetics unknownRareAntithrombin III deficiencyProtein C deficiencyProtein S deficiencyVary RareFibrinolysis defectsHomozygus homocystinuria deficiency of cystathione b-synthetaseSecondary AcquiredHigh risk for thrombosisProlonged bed rest or immobilizationMyocardial infarctionAtrial fibrilationTissue injury surgery, fracture, bumCancerProsthetic cardiac valvesDisseminated intravascular coagulationHeparin-induced thrombocytopeniaAntiphospholipid antibody syndromeLower risk for thrombosisCardiomyopathyNephrotic syndromeHyperstrogenic states pregnancy and postpartumOral contraceptive useSickle cell anemiaSmoking 