The administration of which coagulant is an error by the nurse?

A. Oral warfarin: Warfarin is correctly administered orally. It is a vitamin K antagonist used for long-term anticoagulation and is only effective when taken by mouth, making this a proper route of administration. B. Oral dabigatran: Dabigatran is a direct thrombin inhibitor used to prevent stroke and systemic embolism in atrial fibrillation. It is also administered orally, and the route here is correct. C. Subcutaneous heparin: Heparin for prophylactic use (e.g., prevention of DVT) is appropriately given via subcutaneous injection. This method provides a slow and steady release into the bloodstream, making it a proper administration route. D. Intramuscular enoxaparin: Enoxaparin, a low molecular weight heparin, should never be given intramuscularly due to the high risk of hematoma formation. The correct route is deep subcutaneous injection, typically into the abdomen.