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: Medicine
[{'content': 'Which one of the following is false about PNH \nSelect and explain. \nA. Thrombosis is the leading cause of death, B. Bone marrow is hyperplastic, C. Gold standard  test - sucrose lysis test, D. Hemolysis precipitated during exercise', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Gold standard\xa0 - Flow cytometry.', 'role': 'assistant'}]