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
[{'content': 'Which of the following is NOT an advantage of low molecular weight heparin over unfractionated heparin ? \nSelect and explain. \nA. Higher efficacy in arterial thrombosis, B. Less frequent dosing, C. Higher and more consistent subcutaneous bioavailability, D. Laboratory monitoring of response not required', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]