This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pharmacology
[{'content': 'The appearance of markedly vacuolated, nucleated red cells in the marrow, anemia and reticulocytopenia are characteristic dose-dependent side effects of: \nSelect and explain. \nA. Azithromycin, B. Chloramphenicol, C. Clindamycin, D. Doxycycline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Chlormaphenicol(Ref: KDT 8th/e p791)The features given are of bone marrow suppression which a very significant adverse effect of chlormaphenicol.', 'role': 'assistant'}]