This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Medicine
Oral factor Xa inhibitor is:- 
Select and explain. 
A. Dabigatran etexilate, B. Rivaroxaban, C. Fondaparinux, D. Bivalirudin
B: Rivaroxaban
Answer: B: Rivaroxaban 
Explanation: Option A: DABIGATRAM- THROMBIN inhibitor Option B: RIVAROXABAN- Xa inhibitor Option C: FONDAPARINUX: Ultra LMWH Option D :BIVALIRUDIN is a direct thrombin inhibitor