<prompt> A patient of thrombosis of veins has been receiving coumarin therapy for three years. Recently she developed bleeding tendency. How will you reverse the effect of coumarin therapy?Protamine injectionVit K injectionInfusion of fibrinogenWhole blood transfusion  <response>: Ans. B Vit. K injectionRef: KDT 8e p661,662Vitamin K is used to reverse bleeding tendency raised INR in warfarin overdose whereas fresh frozen plasma is treatment of choice for bleeding due to warfarin. 