This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
Apixaban is classified as 
Select and explain. 
A. Parenteral Direct Thrombinn Inhibitor, B. Oral Direct Thrombin Inhibitor, C. Oral factor Xa inhibitor, D. Parenteral factor Xa Inhibitor
C: Oral factor Xa inhibitor
Answer: C: Oral factor Xa inhibitor 
Explanation: Apixaban is an oral, direct, selective factor Xa inhibitor with a rapid onset of action. Parenteral direct thrombin Inhibitors Oral direct thrombin inhibitor Oral factor Xa inhibitor Lepirudin Desirudin Argatroban Bivalirudin Dabigatran Rivaroxaban Apixaban Edoxaban (Undergoing regulatory review) Ref: Goodman and Gilman 13th edition Pgno: 262