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: Unknown
[{'content': 'CD59 deficiency leads to: \nSelect and explain. \nA. PNH, B. Chediak-Higashi disease, C. Hairy cell leukemia, D. Hemolytic uremic syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref. Robbins Pathology. 9th edition. Page. 642\nPNH :\n\nDefect in GPI linked proteins\xa0 - CD55 and CD 59\nMutation in PIGA gene\nIntravascular hemolysis\nTriad – IV hemolysis, Thrombosis, Pancytopenia\nCan result in AML\nDiagnostic methods\n\n\nHAM test – no more used\nGel card test\nFlow cytometry – IOC\nBest – FLAER (Fluorescent Aerolysin test)', 'role': 'assistant'}]