This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'A patient who is on LMWH, suddenly develops hemorrhage, next step is \nSelect and explain. \nA. Level of factor X, B. APTT, C. Platelet count, D. PT', 'role': 'user'}, {'content': "Answer: A \nExplanation: LMWH is monitored by factor Xa assay.(Refer: Harrison's Principles of Internal Medicine, 18th edition, pg no: 996)", 'role': 'assistant'}]