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
Low molecular weight heparin acts on - 
Select and explain. 
A. XIa, B. Xa, C. IXa, D. Ila
B: Xa
Answer: B: Xa 
Explanation: Ans. is 'b' i.e., Xa Mechanism of Action of Heparin