text: <unk> <unk><unk>  are a class of anticoagulants which act by inhibiting<unk> <unk> , which is a common<unk>  for both the intrinsic and extrinsic pathways of the coagulation cascade.
option_0: Unstable angina / non ST elevation myocardial infarction factor Xa inhibitors therapy
option_1: Unstable angina / non ST elevation myocardial infarction anticoagulant therapy
option_2: Unstable angina / non ST elevation myocardial infarction direct thrombin inhibitors therapy
option_3: ST elevation myocardial infarction anticoagulant and antithrombotic therapy
option_4: Chronic stable angina treatment clopidogrel
option_5: Unstable angina / non ST elevation myocardial infarction unfractionated heparin therapy
option_6: Unstable angina / non ST elevation myocardial infarction low molecular weight heparin therapy
option_7: ST elevation myocardial infarction fibrinolytic therapy