<prompt> The appearance of markedly vacuolated, nucleated red cells in the marrow, anemia and reticulocytopenia are characteristic dose-dependent side effects of:AzithromycinChloramphenicolClindamycinDoxycycline  <response>: Ans. B ChlormaphenicolRef: KDT 8the p791The features given are of bone marrow suppression which a very significant adverse effect of chlormaphenicol. 