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': 'Intra epithelial bulla is seen in – \nSelect and explain. \nA. Pemphigus, B. Pemphigoid, C. Dermatitis herpetiformis, D. Light eruption', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pemphigus vulgaris causes intraepidermal bullae.', 'role': 'assistant'}]