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
Post operative thromboprophylaxis by low molecular weight heparin is best done by which route of administration? 
Select and explain. 
A. Subcutaneous, B. Intravenous, C. Inhalational, D. Intramuscular
A: Subcutaneous
Answer: A: Subcutaneous 
Explanation: Ans. A. Subcutaneous* Both heparin 5,000 units subcutaneously every 8 hours and enoxaparin 40 mg subcutaneously once daily provide highly effective and safe prophylaxis for patients undergoing colorectal surgery.