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
Which of the following anticoagulants is an oral direct Xa inhibitor? 
Select and explain. 
A. Fondaparinux, B. Dabigatran, C. Rivaroxaban, D. Lepirudin
C: Rivaroxaban
Answer: C: Rivaroxaban 
Explanation: Drugs ending with XABAN are Xa inhibitor. Rivero XABAN ApiXABAN Edo XABAN BefXABAN Dabigatran:- Direct Thrombin inhibitor Only oral agent in Class(DTI) Can reverse with Idarucizumab Fondaparinux :- LMWH which acts only on Factor Xa Lepirudin:- Direct Thrombin Inhibitor