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: Pathology
[{'content': 'Primary hemostasis is disturbed in \nSelect and explain. \nA. Platelet disorder, B. lupus anticoagulant, C. hemophilia, D. Liver disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]