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': 'The following condition is associated with brown skin pigmentation, hypoplasia of kidney and spleen, absent or hypoplastic thumb or radius, microcephaly and mental and sexual retardation \nSelect and explain. \nA. Aplastic Anemia, B. Pernicious Anemia, C. Sickle Cell Anemia, D. Megaloblastic Anemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]