A 40 year old female developed persistent oral ulcers followed by multiple flaccid bullae on trunk and extremeties.Direct examination of a skin biopsy immunoflurescene showed intercellular IgG deposits in the epidermis and suprabasal split with acantholytic cells.The probable diagnosis is

• A. Erytheme multiforme
• B. Dermatitis herpetiformis
• C. Pemphigus vulgaris
• D. Pemphigoid