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
Low molecular weight heparin inhibits ? 
Select and explain. 
A. Factor Xa, B. Factor Xa and IIa, C. Factor IIa, D. Factors II, VII, IX and X
A: Factor Xa
Answer: A: Factor Xa 
Explanation: Ans. is 'a' i.e., Factor Xa o Low molecular (fractionated) heparins inhibits -4 Factor Xa o Unfractionated inhibits --) Factor Ha & Xa