Answer- B. It is less protein boundCompared to unfractionated heparin, Low molecular weight heparin (LMWH) has reliable anticoagulant action because it is less protein bound.Indications of LMW heparins:Prophylaxis of DVT and pulmonary embolism in high-risk patients undergoing surgery stroke or other immobilized patientsTreatment of established DVTUnstable anginaTo maintain patency of cannulae and shunts in dialysis patients and in extracorporeal circulation.