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
Orally acting direct thrombin inhibitor is? 
Select and explain. 
A. Bivalirudin, B. Ximelgatran, C. Lepirudin, D. Argatroban
B: Ximelgatran
Answer: B: Ximelgatran 
Explanation: Ximelgatran is an oral direct thrombin inhibitor. All the other given drugs are parenterally acting direct thrombin inhibitor. From medical pharmacology padmaja 4th edition Page no 334