This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
All of the following are parenteral Direct Thrombin Inhibitor except 
Select and explain. 
A. Lepirudin, B. Bivalirudin, C. Argatroban, D. Dabigatran
D: Dabigatran
Answer: D: Dabigatran 
Explanation: Dabigatran & Ximelagatron are Oral Direct Thrombin Inhibitors.