This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Iron deficiency anemia, Subject name: Pathology
[{'content': 'Ringed sideroblasts are seen in: \nSelect and explain. \nA. AML, B. MDS, C. Anaemia of chronic disease, D. ALL', 'role': 'user'}, {'content': "Answer: B \nExplanation: - MDS: These are commonly associated with Ringed sideroblasts. Other conditions associated with Ringed sideroblasts are : Congenital sideroblastic anemia Lead poisoning Anti-tubercular drugs like isoniazid Pyridoxine deficiency Anemia due to alcoholism. - Their presence can be confirmed with Perl's stain", 'role': 'assistant'}]