This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'As compared to unfractionated heparin, low molecular weight heparins \nSelect and explain. \nA. Are absorbed more uniformly when given subcutaneously, B. Require more frequent laboratory monitoring, C. Cannot be given to patients with heparin induced thrombocytopenia, D. Predispose to a higher risk of osteopenia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Low molecular weight heparin has higher subcutaneous bioavailability. Lab monitoring is not required unlike heparin. LMWH has lower risk of osteoporosis and lower incidence of thrombocytopenia. From medical pharmacology padmaja 4th edition Page no 337, 339', 'role': 'assistant'}]