This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc. (R.B.C), Subject name: Pathology
[{'content': 'Bone marrow in lead poisoning contains? \nSelect and explain. \nA. Ringed siderocytes, B. Giant metamyelocytes, C. Dwarf megakaryocytes, D. Fibrotic changes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Ringed siderocytes(Ref: Wintrobe's 12th/pg 848)Bone marrow in lead poisoning contains Ringed siderocytes.Hematologic findings in Lead poisoning include:Anisocytosis with microcytic Hypochromic AnemiaBasophilic stipplingRinged sideroblasts in bone marrow may be seen", 'role': 'assistant'}]