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: Dental
[{'content': 'A 24 years old female has flaccid bullae in the skin and oral erosions. Histopathology shows intraepidermal acantholytic blister. The most likely diagnosis is – \nSelect and explain. \nA. Pemphigoid, B. Erythema multiforme, C. Pemphigus vulgaris, D. Dermatitis herpetiformis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Flaccid bullae\nMucosa involved\nIntraepidermal acantholysis', 'role': 'assistant'}]