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
Which of the following is a low molecular weight heparin: 
Select and explain. 
A. Hirudin, B. Enoxaparin, C. Tranexamic acid, D. Lepirudin
B: Enoxaparin
Answer: B: Enoxaparin 
Explanation: Ans. (b) Enoxaparin* Enoxaparin is a low molecular weight heparin.* It acts by inhibiting factor Xa.* LMWH usually doesn't need monitoring because of consistent bioavailability.* Drugs under LMWH:# Enoxaparin# Dalteparin# Tinzaparin# RabiparinAlso Know* Hirudin along with Lepirudin and Bivalirudin is an anticoagulant which is act by direct thrombin (factor IIa) inhibition.* Tranexamic acid is an anti-fibrinolytic agent.