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': 'Intrinsic cell wall defect of RBCs is feature of ? \nSelect and explain. \nA. Paroxysmal nocturnal hemoglobinuria, B. Sickle cell anemia, C. Herediatary sperocytosis, D. All of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Paroxysmal nocturnal hemoglobinuria", 'role': 'assistant'}]