<prompt> Use of anticoagulant isVenous thrombosisAerial thrombosisVitamin K toxicityHea failure  <response>: Ans. isai.e., Venous thrombosisRef : Katzung e p. 599; lhle p. 554Prophylaxis for venous thrombus:Heparin unfractionated, LMW, or fondaparinux and oral anticoagulants warfarin. 