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Dental
A 40-yr-old male repoed with recurrent episodes of oral ulcers, large areas of denuded skin and flaccid vesiculobullous eruptions. Which of the following would be the bedside investigation helpful in establishing the diagnosis?
Gram staining of the blister fluid
Culture and sensitivity
Skin biopsy and immunofluroscence
Tzank smear from the floor of bulla
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