This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anticoagulants and Coagulants, Subject name: Pharmacology
Use of anticoagulant is - 
Select and explain. 
A. Venous thrombosis, B. Arterial thrombosis, C. Vitamin K toxicity, D. Heart failure
A: Venous thrombosis
Answer: A: Venous thrombosis 
Explanation: Ans. is 'a' i.e., Venous thrombosis Prophylaxis for venous thrombuso Heparin (unfractioned, LMW, or fondaparinox) and oral anticoagulants (warfarin).Prophylaxis for arterial thrombuso Aspirino Clopidogrelo Ticlopidine