Fondaparinux is an anticoagulant that acts by inhibiting: (A) Factor Xa more than factor II, (B) Both factor Xa and factor II equally, (C) Only factor Xa, (D) Only factor II
Answer is C. Fondaparinux is a synthetic congener of Heparin containing only active pentasaccharide unit and inhibits only Xa. It doesn't inhibit thrombin (factor II a).