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: Microbiology
[{'content': 'In a patient with a vesicle on shin. Microscopy on Tzank smear showed giant cells. Causative agents is: \nSelect and explain. \nA. Vaccinia virus, B. Varicella zoster, C. Tuberculous, D. Molluscum contagiosum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Le Varicella zoster Multinucleated giant cells and type a intranculear inclusion bodies may be seen in smears prepared by scraping the base of early vesicles (Tzank smears) and stained with toludine blue, Giemsa or Papanicolou stain" Note: Electron microscopy of vesicle fluid can demonstrate the typical virus', 'role': 'assistant'}]