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: Pediatrics
[{'content': "Fanconi's anemia is a – \nSelect and explain. \nA. Constitutional anemia, B. Hemolytic anemia, C. Iron deficiency anemia, D. Auto - immune anemia", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Constitutional pancytopenia\n\nConstitutional pancytopenia is defined as decreased marrow production of the 3 major hematopoietic lineages on an inherited basis, resulting in anemia, neutropenia and thrombocytopenia.\nImportant causes are : -\nFanconi anemia\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 o Amegakaryocytic thrombocytopenia\nShwachman-Diamond syndrome\xa0\xa0\xa0\xa0\xa0 o Down syndrome\nDyskeratosis congenita\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0 o Noonan syndrome', 'role': 'assistant'}]