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': 'PNH is associated with deficiency of: \nSelect and explain. \nA. DAF (Decay accelerating factor), B. MIRL (Membrane inhibitor of reactive lysis), C. GPI Anchored Proteins (Glycosyl phosphatidyl Inositol anchored proteins), D. LFA (Lymphocyte function associated antigen)', 'role': 'user'}, {'content': "Answer: C \nExplanation: Out of all the options given GPI Anchored Proteins is the best answer because DAF, MIRL and LFA are among the various GPI proteins found to be deficient in PNH. Ref: Wintrobe's Clinical Hematology By John P. Greer, Maxwell Myer Wintrobe, Page 1007.", 'role': 'assistant'}]